According to the new traffic laws, peopl_爱下问搜题

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问题选择题

According to the new traffic laws, people _______ drive after drinking wine or beer.[ ]

A. wouldn't

B. couldn't

C. needn't

D. mustn't

答案

答案：D

单项选择题

⊙O₁和⊙O₂的半径分别为2和6，O₁O₂=5，它们的一条公切线切点为A，B，则AB=（）。

A.4

B.16

C.2

D.9

E.3

填空题

多数宿根花卉可利用植株的（）进行扦插。