刀开关是一种（）操作的开关。A.频繁 B.不频繁 C.延时 D.定时_爱下问搜题

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问题单项选择题

刀开关是一种（）操作的开关。

A.频繁

B.不频繁

C.延时

D.定时

答案

参考答案：B

填空题

从方框中选择恰当的单词填空，使短文意思完整。

where, some, chair, set, and, on, plants, alarm clock, they, what

This is the bedroom (卧室) of Alan. It is clean (干净的). There are (有) 1_____ pictures on the wall (墙).
There is a 2_____ of keys and an 3_____ on the desk. His backpack is on the 4_____ . His jacket is 5_____
the bed. 6_____ are his video tapes? 7_____ are in the drawer. 8_____ are those on the sill (窗台)? Oh,
those are 9_____ and flowers (花). 10_____ where's his math book? It's in the bookcase.

单项选择题

气瓶要放在距热源较远的地方，距明火距离要大于（）米。

A.2

B.3

C.4

D.10