每当儿子哭闹时，小何就会动手打儿子。在妻子的劝说下，小何来见社会工作者。社会工作者了

饲养场有公鸡245只，母鸡的只数比公鸡的3倍多45只，饲养场一共有多少只母鸡？

根据对话内容，完成对话中所缺单词，每空一词。

A: Can you tell us what we can do to protect our environment, Bob?

B: Sure, Mr. Smith. Remember to turn off the light. It (1)________ electricity.

A: Yes. What else?

B: We can (2)________ bikes to school. There will be less air pollution.

A: Right. Do you take your own bags when you go shopping?

B: Oh, I always (3)________ to take one. I'll remember to do it from now on.

A: And you should use both (4)________ of paper.

B: All right.

A: Do you recycle soft drink cans?

B: Yes. I have been doing it for two years.

A: Great! The environment is really (5)_________ to us and we can do lots of things for it.

下列选项中（）茶室插花的目的。

A.烘托品茗环境

B.寓意主题

C.为茶室增添色彩

D.表达心情

小型保险经纪人在选择保险人时应选择( )。

A．愿意提供低保险费率的保险人
B．愿意提供优惠政策的保险人
C．愿意保持长期合作的保险人
D．愿意提供技术建议的保险人

简述耙斗装岩机的结构及工作原理。