科学家最新研制了一款微型无人侦察机——“蜂鸟”.为了减轻其质量，该侦察机的材料应具有的特点是（）_刷题宝

题干

科学家最新研制了一款微型无人侦察机——“蜂鸟”.为了减轻其质量，该侦察机的材料应具有的特点是（）

A：硬度高

B：熔点低

C：密度小

D：导热性好

上一题下一题 0.0难度选择题更新时间:2018-05-02 11:41:21

答案(点此获取答案解析）

C

同类题1

—__________！

同类题2

观察漫画《数码时代的孤单》。下列给晚辈的建议最合适的是（）

同类题3

—I know what we can do to raise money. We can have a car wash.

—_____ I like it a lot.

同类题4

如图所示的电路中，电池的电动势为

是两个阻值固定的电阻。当可变电阻R的滑片向a点移动时，通过R₁的电流I₁和通过R₂的电流I₂将发生的变化是（）

同类题5

阅读短文，回答下列问题

One day a poor man was cutting a big piece of wood (木头) near a river. Suddenly his old axe (斧子) fell into the water. He felt very sad because he lost his only axe. Then all at once a beautiful fairy (仙女) came out and asked the man what was the matter.

"I have lost my axe." he said, "It fell into the water when I was cutting the wood."

The fairy showed him a gold axe and asked, "Is that yours?"

"No." said the man.

The fairy then showed him a silver (银) axe and asked again, "Is this yours?"

"No." again answered the man.

Then she showed him the old axe.

"Yes, that is mine." called out the happy man.

"I know it well enough." said the fairy, "I only wanted to see if you would tell me the truth, and now I'll give you the gold axe and the silver axe besides (包括) your own one."

小学学科试题库

初中学科试题库

高中学科试题库