问题 多项选择题

并联电容器主要作用是()改善电压质量。

A、补偿无功功率,提高功率因数

B、提高供电设备的出力

C、降低功率损耗和电能损失

D、减少电费

答案

参考答案:A, B, C

阅读理解

阅读理解。

Dear Peter,

     My name is Frank.I am from(来自)America.Here is a picture of my class(班).We are in Class

One, Grade Seven.

     You can see my friends in the picture.Jimmy likes to play basketball.He likes to eat apples and

French fries.Helen likes math.Her favourite food is hamburgers.Sandra doesn't like math.But

shecan speak French(法语).She likes ping-pong.Sally is a black(黑人的) girl.She likes to swim

(游泳).She likes to eat ice cream.I like math too.Can you find(寻找) me? I like to eat bananas.

Maria likes computer very much.She plays computer games very well.Nick is fun.He can play

football.He likes strawberries best.

     Can you send(发送)me a picture of your class?

                                                                                                                                           Yours,

                                                                                                                                            Frank

1.Frank has    __    friends.

A.seven

B.six

C.five

2.___     like sports.

A.Jimmy, Sandra and Sally

B.Maria, Nick and Jimmy  

C.Sally, Nick, Jimmy and Sandra

3.    ___ and  ___    like math. 

A.Helen; Frank  

B.Sandra; Peter  

C.Helen; Sandra

4.    ___ and  ___    like fruit. 

A.Nick, Maria; Jimmy  

B.Nick, Frank; Peter  

C.Jimmy, Nick; Frank

5. ___    is the e-friend of Frank.

A.Sally

B.Sandra

C.Peter

单项选择题