1.选择题- (共10题)
2.设计实验证明金属的导热性。根据你所设计实验的需要,自行选择下述仪器及用品:带铁圈的铁架台、小蜡烛、酒精灯、长铜片、铁丝、火柴。
实验操作(可用文字叙述,也可用图示) | 实验现象 |
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3.设计实验证明金属的导热性。根据你所设计实验的需要,自行选择下述仪器及用品:带铁圈的铁架台、小蜡烛、酒精灯、长铜片、铁丝、火柴。
实验操作(可用文字叙述,也可用图示) | 实验现象 |
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6.阅读下面科普短文。
绿色植物的光合作用
沐浴在阳光下的绿色植物在悄悄地进行着一个重要的化学变化——光合作用。它是绿色植物通过叶绿体,利用光能,把二氧化碳和水转化成储存能量的有机物(淀粉),并且释放氧气的过程。绿色植物的光合作用需要什么条件呢?

【实验1】实验装置如右图所示。一段时间后,取玻璃瓶内罩住的叶片及未罩住的一个叶片,分别经过脱色等处理,加入碘溶液。观察到前者无变化,后者变蓝。
【实验2】操作步骤:①取淡蓝色的BTB溶液倒入试管A中。②另取BTB溶液放入大烧杯中,向溶液中吹气,溶液颜色变黄。③将大烧杯中的BTB溶液倒入B,C,D试管中,在C,D试管中各放入一棵植物。④用橡皮塞将A,B,C,D 4个试管塞紧,并用锡纸将试管D包裹。⑤将4个试管置于光照下,观察BTB溶液的变色情况。实验现象:一段时间后,观察到A试管中溶液颜色仍为淡蓝色,B试管中溶液颜色仍为黄色,C试管中溶液颜色变为淡蓝色,D试管中溶液颜色仍为黄色。

小资料:1.淀粉遇碘会变为蓝色。2.BTB即溴麝香草酚蓝。溴麝香草酚蓝是一种酸碱指示剂、吸附指示剂。BTB溶液在pH < 6时呈黄色,在pH > 7.6时呈蓝色,在pH 为6~ 7.6时呈过渡颜色绿色或淡蓝。其实,绿色植物的光合作用是一个很复杂的过程。通过光合作用,将无机物转变成了有机物,将光能转变成了化学能,同时维持大气中氧气和二氧化碳的平衡。
依据文章内容,回答下列问题:
绿色植物的光合作用
沐浴在阳光下的绿色植物在悄悄地进行着一个重要的化学变化——光合作用。它是绿色植物通过叶绿体,利用光能,把二氧化碳和水转化成储存能量的有机物(淀粉),并且释放氧气的过程。绿色植物的光合作用需要什么条件呢?

【实验1】实验装置如右图所示。一段时间后,取玻璃瓶内罩住的叶片及未罩住的一个叶片,分别经过脱色等处理,加入碘溶液。观察到前者无变化,后者变蓝。
【实验2】操作步骤:①取淡蓝色的BTB溶液倒入试管A中。②另取BTB溶液放入大烧杯中,向溶液中吹气,溶液颜色变黄。③将大烧杯中的BTB溶液倒入B,C,D试管中,在C,D试管中各放入一棵植物。④用橡皮塞将A,B,C,D 4个试管塞紧,并用锡纸将试管D包裹。⑤将4个试管置于光照下,观察BTB溶液的变色情况。实验现象:一段时间后,观察到A试管中溶液颜色仍为淡蓝色,B试管中溶液颜色仍为黄色,C试管中溶液颜色变为淡蓝色,D试管中溶液颜色仍为黄色。

小资料:1.淀粉遇碘会变为蓝色。2.BTB即溴麝香草酚蓝。溴麝香草酚蓝是一种酸碱指示剂、吸附指示剂。BTB溶液在pH < 6时呈黄色,在pH > 7.6时呈蓝色,在pH 为6~ 7.6时呈过渡颜色绿色或淡蓝。其实,绿色植物的光合作用是一个很复杂的过程。通过光合作用,将无机物转变成了有机物,将光能转变成了化学能,同时维持大气中氧气和二氧化碳的平衡。
依据文章内容,回答下列问题:
2.单项选择- (共11题)
11.
Due to the widespread ______ of this medical technology, more diseases can be discovered and treated at an early stage.
A.presentation | B.appreciation | C.qualification | D.application |
12.
Some cyclists make the ______ that traffic laws do not ______ them. It is not true, _____.
A.assumption; apply to; though | B.thought; apply to; however |
C.assuming; apply for; though | D.idea; apply for; however |
13.
Bruce, ______ headmaster of our school, was elected by voting and other leaders were chosen in ______ same way.
A./; the | B.the; the | C./; a | D.a; the |
14.
The fog was so heavy this morning that drivers could hardly _______ the things just ten meters away from them.
A.figure out | B.look out | C.make out | D.try out |
15.
Not far from the club, there is a garden, its owner ________ in it ________ bridge with his children every afternoon.
A.seated; plays | B.seats; plays | C.seated; playing | D.seating; playing |
16.
On returning home, she found a note _______ to the door, _______ “Call in later.”
A.attaching; reading | B.attaches; saying |
C.attached; which reads | D.attached; reading |
17.
Medicine should not be kept where it is _______ to children.
A.addicted | B.accessible | C.attractive | D.aggressive |
18.
— Sorry, I'm afraid the project will be delayed. Time is so limited!
— Take it easy. You will have two assistants ______.
— Take it easy. You will have two assistants ______.
A.at your command | B.at your expense |
C.at your convenience | D.at your sacrifice |
19.
What do you think of the suggestion _______ he offered us _______ we go to New York for our holiday?
A.what; that | B.which; that |
C.which; what | D.what; what |
20.
________ the meeting himself gave them a great deal of encouragement.
A.The president will attend B. The president to attend
B.That the president attended D. The president attending
A.The president will attend B. The president to attend
B.That the president attended D. The president attending
试卷分析
-
【1】题量占比
选择题:(10道)
单项选择:(11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:8
7星难题:0
8星难题:1
9星难题:0