变压器中性点接地的方式（）A、中性点直接接地 B、中性点经消弧线圈或电阻接地 C、中性点

根据短文内容和首字母提示，把所缺单词的正确形式完整地填写在短文下的横线上。

     At school many things happen to us. We may feel excited when we succeed in a school play. We may

feel sorry if we lose an important (1)g______. We want to keep the memory (记忆) in our lives. How to

keep memories? Our teacher, Mr. Smith, has taught us how to (2)r______ things to make our own yearbook.

A yearbook is a kind of book which is used to memory exciting moments. It's usually made at the end of

year.Last (3)D______, we began to make our yearbook. First we chose the persons that had done something

special, then some students interviewed them, some (4)w______ down their stories, others took photos of

them. Finally our teacher helped us to put the things (5)t______. Then we had our first yearbook.

阅读对话，根据横线上标点符号的提示，在横线上填写适当的句子，使对话完整。

A: Mike, you look worried.

B: Yes, Ms Paula. I’m having trouble leaving English.

A: You said you liked English  小题1:                     ?

B: I can’t get the pronunciation right.

A: Well, why don’t you borrow the teache’s tapes? You can listen to them at home after school.

B: 小题2:                    . But what about the new words?

A: You can write the new words in your notebook and study them at any time.

B: That might really help! Thanks.

A: Can you understand when people talk to you?

B: Not, not always.

A:  小题3:                       ? The English club can help you practice speaking English.

It meets on Tuesday and Friday.

B: I think I will go. Thanks a lot.

A: You’re welcome.

在生态系统中各种生物的数量和所占______总是维持在______的状态叫做生态平衡．

求出下列各组数的最小公倍数。  

（1）6和15    （2）8和10    （3）12和50    （4）3和8

一般来说，有多少种不同的行业，就有多少种不同的职业道德，体现了职业道德的(　　)。

A．范围上的有限性

B．功能上的普遍性

C．内容上的稳定性和连续性

D．形式上的多样性