一投保综合险的车辆在倒车时将车主承包的厂房撞坏，厂房损失（）属于保险责任。A、是B、

Many children seldom communicate with adults, ________ it difficult for their parents to know what they are thinking about.

A．making

B．makes

C．to make

D．made

____ the end of last year, I have been working on the project, and it is progressing well. [ ]

A. Since

B. By

C. At

D. In

矿用各种隔爆型开关必须坚持使用好机械闭锁装置，凡机械闭锁装置损坏或甩掉，视为（）

A、正常

B、不完好

C、失爆

D、完好

水内冷发电机允许的断水运行持续时间为45min（）

吸附膜强度