如果你站在冰面上,突然发现冰面发生断裂,使你能尽快脱离危险的办法是( ) A.争

题型:选择题

问题:

如果你站在冰面上,突然发现冰面发生断裂,使你能尽快脱离危险的办法是(  )

A.争取时间,赶快跑向岸沩

B.立即趴倒,爬到岸边

C.立即改成单脚站立,减小对冰面的压强

D.以上办法都能使你脱离危险

考点:增大和减少压强的办法
题型:选择题

下列属于组织的是(  )

A.血液

B.黄瓜果肉细胞

C.胃

D.人体

题型:选择题

Rewrite the following sentences as required (根据要求改写句子)

小题1:They both are editors of the school newspaper. (改为否定句)

_____ of them ______ an editor of the school newspaper.

小题2:Lucy will leave for London on business in three days. (对划线部分提问)

______ ______ will Lucy leave for London on business?

小题3:The students watched a very exciting match yesterday. (改为感叹句)

_____ ______exciting match yesterday!

小题4:Mr. Brown manages a large Disneyland Park in Japan. (保持句意基本不变)

Mr. Brown is  _____ _____of a large Disneyland Park in Japan.

小题5:If I don’t finish my homework, my mother will not allow me to play computer games. (保持句意基本不变)

I won’t be _______to play computer games_____ I finish my homework.

小题6:The scientists store a lot of information in the computers every day. (改为被动语态)

Much information _____ _____ in the computers every day.

小题7:”Have you got ready for the final exam?” Our class teacher asked the students. (合并一句)

Our class teacher asked us _____ we _____got ready for the final exams.

题型:选择题

“一个物体永远到不了目的地”体现了芝诺的()。

A.飞矢辩

B.二分辩

C.追龟辩

D.运动场辩

题型:选择题

制作悬吊式简易指南针时,丝绸比磁石更有效。()

题型:选择题

清洁房间时为什么要干湿抹布分开?

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