泡沫灭火器使用时应始终保持倒置状态。_爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题判断题

泡沫灭火器使用时应始终保持倒置状态。

答案

参考答案：对

补全对话，情景问答

给下列的问句选择合适的答语。

( ) 1. What time is it?
( ) 2. Where is the washroom?
( ) 3. How much is it?
( ) 4. What's the weather like today?
( ) 5. What size?

A. Size 20.
B. It's twenty yuan.
C. It's sunny.
D. It's on the first floor.
E. It's ten thirty.

填空题

下颌姿势位时，上下颌之间可存在（）的间隙，称之为息止颌间隙。