试题与答案

The why he is absent today is he has got

题型:选择题

题目:

The          why he is absent today is          he has got a bad headache.  

A.reason; that

B.reason; because

C.cause; that

D.cause; because

答案:

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下面是错误答案,用来干扰机器的。

答案:B摩尔质量的单位是g/mol,选项A不正确。如果质量的单位是g,则摩尔质量在数值上等于该物质的相对原子质量或相对分子质量,因此选项B正确,D不正确;Fe2+与Fe3+的摩尔质量相同,都是56g/mol,答案选B。

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题型:阅读理解

Dear Tom,

How are you? I’m in a new school this term. And I’m writing to you in my school now. My new school is big and nice. There are one thousand and four hundred students and one hundred and forty teachers in my school. I like the teachers. They are very kind to me. My classmates are very friendly, too. They teach me Chinese and I teach them English.

There are trees, flowers and green grass(青草) in my school. They are very beautiful. Behind my school there is a small river. The water in it is quite clean. We can swim in it.

We have no classes on Saturdays or Sundays. Sometimes I go to play football or basketball with my classmates. Sometimes I stay at home and watch TV. Sometimes I go to shops with my father and mother. We all like China.

Please write to me soon!

Yours,

Jack

小题1:Jack is in a________ school.

A.English

B.Chinese

C.small

D.Japanese小题2:There are _________ students and _________ teachers in Jack’s school.

A.1, 400; 104

B.1, 040; 104

C.1, 400; 140

D.1,040; 140小题3:Jack’s teachers _________.

A.teach him English very well

B.only teach him Chinese and English

C.don’t like him at all

D.are quite good to him小题4:Jack_________ his new classmates.

A.don’t get on well with

B.don’t like

C.makes good friends with

D.is going to learn English from小题5:Which is right?

A.Jack goes to school every day.

B.Jack doesn’t have classes every day.

C.Jack has no classes only on Saturdays.

D.Jack has no classes only on Sundays.

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题型:单项选择题 共用题干题

蜡型包埋完成后,铸圈在室温中放置一段时间后,便可对铸圈进行烘烤,焙烧和铸造。

如是高熔合金的铸造,对于铸造时机的描述,下述正确的是 ()

A.烤箱内温度达到700℃左右,即开始进行铸造

B.烤箱内温度达到700℃左右,维持约30min,开始铸造

C.烤箱内温度达到900℃左右,开始铸造

D.烤箱内温度达到900℃左右,维持约30min,开始铸造

E.烤箱内温度达到1200℃时,维持约30min,开始铸造

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