蝉蜕可以入药，这里讲的“蜕”其实是蝉的_刷题宝

题干

蝉蜕可以入药，这里讲的“蜕”其实是蝉的（）

A：皮肤

B：内脏

C：外骨骼

D：翅膀

上一题下一题 0.0难度选择题更新时间:2016-01-15 04:42:01

答案(点此获取答案解析）

C

同类题1

利用你所学的化学知识解释下列问题：

同类题2

阅读理解。

I like school days. I can learn many things from school. We have four classes in the morning and two in the afternoon. I like weekends, too. We don't go to school on Saturdays and Sundays. I often play ping-pong and play basketball on Saturday morning. I often play the violin (小提琴) on Saturday afternoon. I often do homework and play football on Sunday morning. I often go to the park on Sunday afternoon.

同类题3

如图所示是水箱液位控制系统，当水箱出水量大时,水位下降浮子下沉，带动活塞偏离进水口位置，此时进行补水直到水箱里的水位上升到给定水位，浮子上浮，活塞归位。在这个系统中，浮子、活塞以及两者之间的连杆机构组成一个杠杆系统。

同类题4

根据题意填空

同类题5

平行，则它们之间的距离为( )

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