在某次的实验中，用10分度的游标卡尺测得小球的直径如图所示，小球的直径为2.40

发布时间：2017-06-22 15:53 │ 来源：www.tikuol.com

题型：实验题

问题：

在某次的实验中，用10分度的游标卡尺测得小球的直径如图所示，小球的直径为2.40 cm，则a= .

考点：实验：探究弹力与弹簧伸长的关系实验：探究小车速度随时间变化的规律实验：探究加速度与力、质量的关系实验：探究功与速度变化的关系

题型：实验题

选字填空。

进近

1．上课铃刚响，明明走( )教室。

娇骄

2．我为我是一个中国人而感到( )傲。

丛从

3．小鸭子终于( )树( )里走出来了。

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题型：实验题

读短文，完成表格。

It was Saturday yesterday. I had no lessons. I got up at six. After breakfast. I went to a farm by
truck with my classmates to help the farmers with apple harvest. As soon as we went there, we began
to pick apples. But some of the apples are too high for me to reach. Jim is very strong. He lifted a ladder
and held it for me. So I was able to pick them. Some of us took the baskets of apples to the truck and
some put the baskets of apples onto the truck.
It was hard work, but we all felt very happy.

1. When did you go?	_________
2. Where did you go?	_________
Who went there ?	My classmates and I
3. How did you get there?	_________
4. What did you do there?	_________
5. How did you feel about it?	_________

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题型：实验题

下列化合物可用Borntrager反应与其他化合物相区别的是（）

A.菲醌

B.香豆素

C.苯醌

D.蒽醌

E.萘醌

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题型：实验题

关于生理性止血的叙述，哪些正确（）

A.系指任一血管破裂出血后在很短时间内自行停止出血的过程

B.血小板在血管损伤的内皮处释放ADP而促进血小板粘聚成团，将损伤处填塞，减少出血的机会，促进生理止血

C.血小板还通过增加5-羟色胺的收缩血管作用促进生理止血

D.血小板还通过释放TXA₂加强血管收缩促进生理止血

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题型：实验题

斯金纳认为被控制的行为常常引起（）的需要。

A、社会性

B、生物性

C、普遍性

D、广泛性

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