受话器是一种将声振转换成话音电流的电话用机件。

根据图片及首字母提示补全下列单词，使短文内容完整、连贯。

      Today is Christmas Day. My  1.h____________ is very beautiful. We have a

big  2.C____________ tree with a  3.s____________ on the top.

In the morning, I received (收到) many gifts, and Christmas  4.c____________.

I was very happy. " Who brought me these gifts, Mum? " I asked. “  5.S____________

brought you last night." said Mum. But I don't think so. I think my Mum and Dad brought them.

They love me very much.

要使Java程序退出Java运行环境，可以执行的代码是______。

氯在水中很不稳定，因此，如果不能及时测定，应加入稳定剂固定。

以转贷方式投入的政府投资资金，在融资方案和财务分析中，应视为( )。

A．现金流量

B．债务资金

C．债权

D．股权

三相交流电源的三根相线的相序颜色分别是（）。

A.红、绿、黄

B.红、黄、绿

C.黄、绿、红

D.黄、红、绿