已知某种型号的纸100张厚度约为1cm，那么这种型号的纸13亿张厚度

搜题请搜索小程序“爱下问搜题”

问题选择题

已知某种型号的纸100张厚度约为1cm，那么这种型号的纸13亿张厚度约为[ ]

A.1.3×10⁷km

B.1.3×10³km

C.1.3×10²km

D.1.3×10km

答案

答案：C

听力题

根据句意，用括号内所给单词的适当形式填空。

小题1:Have you heard of the recent __________ (develop) in online education?

小题2:I believe our charity show will be _______ (success) held.

小题3:The environment is destroyed ________(serious) now.

小题4:Would you please help me find out the _______ (support) names on the list.

小题5:Some _______( operate) have been performed on the blind people.

问答题简答题

1、2号机启励时启励装置动作过程？