1.单选题- (共7题)
A.浓硫酸具有吸水性,在实验室中常用作干燥剂 |
B.浓硫酸具有强腐蚀性,它能使纸张、布料、皮肤等脱水碳化 |
C.能硫酸溶于水时会吸收大量的热,可作制冷剂 |
D.如果不慎将张硫酸沾到皮肤或衣服上,应立即用大量水冲洗,然后涂3%~5%的碳酸氢钠溶液 |
A.滴入紫色石蕊溶液,颜色变红,则该溶液显酸性 |
B.滴入酚酞溶液,溶液保持无色,则该溶液显酸性 |
C.加入Mg粉,有气泡产生,则该溶液显酸性 |
D.加入CaCO3固体,有气泡产生,则该溶液显酸性 |
2.选择题- (共4题)
某市在道路改造过程中,需要铺设一条长为1000米的管道,决定由甲、乙两个工程队来完成这一工程.已知甲工程队比乙工程队每天能多铺设20米,且甲工程队铺设350米所用的天数与乙工程队铺设250米所用的天数相同.
(1)甲、乙工程队每天各能铺设多少米?
(2)如果要求完成该项工程的工期不超过10天,那么为两工程队分配工程量(以百米为单位)的方案有几种?请你帮助设计出来.
The four famous rock stars were due to arrive at any moment and a large crowd of young people had gathered at the airport to welcome them.The police found it difficult to keep the crowd under1after the plane landed and the performers appeared.They smiled and waved2at everybody.Dressed in pink shirts and light blue trousers,and with their long hair and their musical instruments3their shoulders,the four young men looked very much4.
In spite of the large number of policemen5,it was clear that the group would not be able to get to their waiting car6.Word had got out that they had written a new song which would be7when they performed at the grand hall that evening.They were now8with crying of “Play something! Play your new song!”
Even the police looked9when the young men unfolded their instruments and prepared to do one of their numbers as the10for getting out of the airport.The crowd settled down and listened to the first11of the new song. As soon as it was over,there was a great burst of applause and then everyone started12and shouting like crazy. Several young women fainted and had to be carried away by the13unit which was standing by.Greedy for more, the crowd14a repeat performance.Once again the performers gave in,but when the crowd requested still another song,the group cheerfully but firmly15.
Now closely surrounded by the police,they put away their16and stared towards their car which was some distance away.The crowd pushed forward,but the policemen,17arm in arm,prevented anyone from getting through. It took the singers a long time to reach their18.Finally,however,they got in and were just about to drive away when a young woman,who had19to get past the police,jumped onto the roof of the car.She shouted loudly as two policemen20her away and the car began moving slowly through the cheering crowd.
阅读肖万君的《切莫错待“半小时”》片段,完成后面小题。
①“半小时”在一些人看来,是零星的时间。因其小、零碎,一些人从不将其放在眼里,而是轻易让其白白流失。
②比如,有的人上班经常晚到“半小时”,下班经常早走“半小时”;有的人一看只剩下“半小时”了,以为干不成什么事了,就撂下正事闲聊乱侃起来。
③当对此提出异议时,有人辩解道:“不就是短短的‘半小时’嘛!有它能办成个什么事?无它又有什么大不了?”
④“半小时”,真的是无济于事、可有可无吗?据笔者所掌握的有关资料看,一些有成就的专家、学者、伟人,都不是这样认识和对待时间的。世界著名的生物学家达尔文说:“我从来不认为半小时是微不足道的很小的一段时间。”他在总结自己事业成功的经验时告诫人们:“完成工作的方法是爱惜每一分钟。”鲁迅先生也说:“时间就像海绵里的水,只要愿挤,总还是有的。”因为如此,他著作等身,成为了中国现代文学的巨匠。真是:凡在事业上有所成就的人,无一不是利用时间的能手。
⑤为什么一些人只看重成块的“大段时间”,而不把零星的“小段时间”放在眼里呢?一个重要原因是,他们认为,只有“大段时间”才好办事情,用起来才方便,而零星的“小段时间”,一次办不完一件事,用起来有些麻烦。
⑥应当认识到, 。“大段时间”比较集中,用起来充裕、方便,“小段时间”比较分散、零碎,用起来较为麻烦,这是两者的不同。但是,“大段时间”是由“小段时间”积成的,是含在一节节“小段时间”之中的,没有分分秒秒,就没有“半小时”、“一小时”,没有月月年年。“天下大事,必作于细。合抱之木,生于毫末。九层之台,起于垒土。千里之行,始于足下。”不善于利用时间,不仅“小段时间”会失掉,“大段时间”的效率也会降低,“大段时间”也会转化成为“小段时间”。一个人每天、每周、每月要做许许多多事情,每件事情不会都是恰恰用整时间做完。人的一生中是会经常地、大量地遇到零星的“小段时间”的,充分利用好这些零星的“小段时间”,对于人的一生具有重要意义。
⑦“时间就是生命。”“时间就是财富。”“一寸光阴一寸金,寸金难买寸光阴。”立志事业有成的朋友们,请珍惜工作中的一个个“半小时”,过好自己生命中的“每一分钟”吧! (选自《人民日报》)
3.填空题- (共1题)
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【1】题量占比
单选题:(7道)
选择题:(4道)
填空题:(1道)
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【2】:难度分析
1星难题:0
2星难题:0
3星难题:0
4星难题:0
5星难题:0
6星难题:3
7星难题:0
8星难题:4
9星难题:1