下列动物中,属于不完全变态发育的是[ ]
A.蜜蜂
B.蝗虫
C.蚕
D.蚊
答案:B
A.C60是碳的一种同素异形体
B.C60是一种新型的化合物,有着重要的应用
C.C60分子的摩尔质量为720
D.C60的相对分子质量为720g/mol
1、It’s___ ___( 星期三 ) today.
2、Do you want to go on a__ ____(旅行 ) to Beijing?
3、There are two __ ____(女人) in the room.
4、The boy always speaks in a l __ ____voice in public.
5、Our teacher are very f__ ___ to us.