1.计算题- (共2题)
(NH4)2SO4+2NaOH△Na2SO4+2H2O+2NH3↑; 2NH3+H2SO4==(NH4)2SO4。
请计算:

(1)完全反应后产生氨气 g。
(2)该化肥的含氮量为 (精确到0.1%),
则这种化肥属于 (填:“合格”或“不合格”。
合格硫酸铵含氮量为20%以上)产品。
(3)请计算废硫酸中硫酸的质量分数(写出计算
过程)。
(4)若实验过程中氨气被完全吸收,但该实验测得硫酸铵化肥的含氮量高于实际值,其原因是 。

⑴A点产生气体的质量为 ;
⑵试样中碳酸钠的质量分数(结果精确到0.1%);
⑶B点时,烧杯内溶液中溶质的化学式 。
2.单选题- (共8题)
A.氯化钾 |
B.碳酸氢铵 |
C.硫酸铵 |
D.过磷酸钙 |

A.甲:熟石灰; 乙:稀盐酸 |
B.甲:水; 乙:氢氧化钠溶液 |
C.甲:氢氧化钠溶液; 乙:水 |
D.甲:稀盐酸; 乙:氯化钠溶液 |
A. 过磷酸钙[Ca(H2PO4)2和CaSO4的混合物]属于氮肥
B. 凡施用过化肥的蔬菜都会危害健康
C. 硫酸钾与熟石灰混合、研磨,能闻到刺激性的气味
D. 合理施用化肥能提高农作物的产量
3.选择题- (共8题)
You're not doomed to toss and turn every night. Although you might not be able to control all of the factors that relate to your sleep, you can adopt habits that encourage better sleep. Start with these simple sleep tips.
No. 1: Stick to a sleep schedule
Go to bed and get up at the same time every day, even on weekends, holidays and days off. Being consistent reinforces (加强) your body's sleep-wake cycle and helps promote better sleep at night. If you don't fall asleep within about 15 minutes, get up and do something relaxing. Go back to bed when you're tired.
No. 2: Pay attention to what you eat and drink
Don't go to bed either hungry or stuffed. Your discomfort might keep you up. Also limit how much you drink before bed, to prevent disruptive middle-of-the-night trips to the toilet. Nicotine, caffeine and alcohol deserve caution, too. The stimulating effects of nicotine and caffeine — which take hours to wear off — can ruin quality sleep.
No. 3: Create a bedtime ritual
Do the same things each night to tell your body it's time to wind down. This might include taking a warm bath or shower, reading a book, or listening to light music. Be careful of using the TV or other electronic devices as part of your bedtime ritual. Some research suggests that screen time or other media use before bedtime has impact on sleep.
No. 4: Get comfortable
Create a room that's ideal for sleeping. Often, this means cool, dark and quiet. Consider using room-darkening shades, earplugs, a fan or other devices to create an environment that suits your needs.
Your mattress and pillow can contribute to better sleep, too. Since the features of good bedding are subjective, choose what feels most comfortable to you. If you have children or pets, set limits on how often they sleep with you — or insist on separate sleeping quarters.
No. 5: Limit daytime naps
Long daytime naps can affect nighttime sleep — especially if you're struggling with poor sleep quality at night. If you choose to nap during the day, limit yourself to about 10 to 30 minutes and make it during the mid-afternoon.
If you work nights, you'll need to make an exception to the rules about daytime sleeping. In this case, keep your window coverings closed so that sunlight — which adjusts your internal clock — doesn't interrupt your daytime sleep.
No. 6: Include physical activity in your daily routine
Regular physical activity can promote better sleep, helping you to fall asleep faster and to enjoy deeper sleep. Timing is important, though. If you exercise too close to bedtime, you might be too energized to fall asleep. If this seems to be an issue for you, exercise earlier in the day.
No. 7: Manage stress
When you have too much to do — and too much to think about — your sleep is likely to suffer. To help restore peace to your life, consider healthy ways to manage stress. Start with the basics, such as getting organized, setting priorities and dividing tasks. Give yourself permission to take a break when you need one. Share a good laugh with an old friend.
Nearly everyone has an occasional sleepless night — but if you often have trouble sleeping, contact your doctor. Identifying and treating any underlying causes can help you get the better sleep you deserve.
增加:在缺词处加一个漏字符号(∧),并在其下面写出该加的词。
删除:把多余的词用斜线(﹨)划掉。
修改:在错的词下划一横线,并在该词下面写出修改后的词。
注意:1.每处错误及其修改均仅限一词;2.只允许修改10处,多者(从第11处起)不计分。
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Greece's finance minister says his country's financial situation is “terribly urgent” and the crisis could come to a head in a couple of weeks. Yanis Varoufakis gave the warning after eurozone finance ministers met in Brussels to discuss the final €7.2bn tranche(援助资金) of Greece's €240bn EU/IMF bailout(紧急援助).
Ministers said Greece had made “progress” but more work was needed.
The Greek government is struggling to meet its payment obligations(责任).Earlier, Greece began the transfer of €750m (£544m, $834m) in debt interest to the International Monetary Fund - a day ahead of a payment deadline.
“The liquidity(资产流动性) issue is a terribly urgent issue. It's common knowledge, let's not beat around the bush,” Mr Varoufakis told reporters in Brussels. “From the perspective of timing, we are talking about the next couple of weeks.”
Greece has until the end of June to reach a reform deal with its international creditors. Its finances are running so low that it has had to ask public bodies for help. The crisis has raised the prospect that Greece might default(违约) on its debts and leave the euro.
In a statement, the eurozone finance ministers said they “welcomed the progress that has been achieved so far” in the negotiations,” but added: “We acknowledged that more time and effort are needed to bridge the gaps on the remaining open issues.” Eurogroup chairman Jeroen Dijsselbloem said there had to be a full deal on the bailout(紧急财务援助) before Greece received any further payments. “There are time constraints(限制;约束) and liquidity constraints and hopefully we will reach an agreement before time runs out and before money runs out.” he said.
There had been fears that Greece would default on its IMF debt repayment due on Tuesday. However, a Greek finance ministry official was quoted as saying that the order for repayment had been executed(实施) on Monday. Almost €1bn has been handed over to the IMF in interest payments since the start of May.
It is unclear how the government came up with the funds, but the mayor of Greece's second city Thessaloniki revealed last week that he had handed over cash reserves in response to an appeal for money.
Greece's finance minister says his country's financial situation is “terribly urgent” and the crisis could come to a head in a couple of weeks. Yanis Varoufakis gave the warning after eurozone finance ministers met in Brussels to discuss the final €7.2bn tranche(援助资金) of Greece's €240bn EU/IMF bailout(紧急援助).
Ministers said Greece had made “progress” but more work was needed.
The Greek government is struggling to meet its payment obligations(责任).Earlier, Greece began the transfer of €750m (£544m, $834m) in debt interest to the International Monetary Fund - a day ahead of a payment deadline.
“The liquidity(资产流动性) issue is a terribly urgent issue. It's common knowledge, let's not beat around the bush,” Mr Varoufakis told reporters in Brussels. “From the perspective of timing, we are talking about the next couple of weeks.”
Greece has until the end of June to reach a reform deal with its international creditors. Its finances are running so low that it has had to ask public bodies for help. The crisis has raised the prospect that Greece might default(违约) on its debts and leave the euro.
In a statement, the eurozone finance ministers said they “welcomed the progress that has been achieved so far” in the negotiations,” but added: “We acknowledged that more time and effort are needed to bridge the gaps on the remaining open issues.” Eurogroup chairman Jeroen Dijsselbloem said there had to be a full deal on the bailout(紧急财务援助) before Greece received any further payments. “There are time constraints(限制;约束) and liquidity constraints and hopefully we will reach an agreement before time runs out and before money runs out.” he said.
There had been fears that Greece would default on its IMF debt repayment due on Tuesday. However, a Greek finance ministry official was quoted as saying that the order for repayment had been executed(实施) on Monday. Almost €1bn has been handed over to the IMF in interest payments since the start of May.
It is unclear how the government came up with the funds, but the mayor of Greece's second city Thessaloniki revealed last week that he had handed over cash reserves in response to an appeal for money.
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【1】题量占比
计算题:(2道)
单选题:(8道)
选择题:(8道)
-
【2】:难度分析
1星难题:0
2星难题:0
3星难题:0
4星难题:1
5星难题:0
6星难题:3
7星难题:0
8星难题:4
9星难题:0