水是人类生存不可缺少的物质.图中能正确描述水的各物理量之间关系的图像是[ ] A

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问题:

水是人类生存不可缺少的物质.图中能正确描述水的各物理量之间关系的图像是[ ]

A.

B.

C.

D.

考点:比热容的概念液体压强的特点密度公式的应用重力的计算
题型:选择题

阅读理解。

     Mike'mother asks him to buy some vegetables. She give him some money

and a basket.

     "Be careful. Let the cars pass by first and then you can cross the street."

     "I see,"says Mike.

     An houe later,Mike doesn't come back. His mother goes to look for him.

She finds Mike standing by the street with the empty basket.

     "What's the matter,Mike?"

     "I stand here for a long time but there isn't a car." Answers Mike.

1.Mike's mother wants him to        

A.buy some apples

B.wait for cars

C.buy some vegetables

D.watch cars carefully

2.Mike's mother     

A.tells him to come back early

B.tells him to be careful

C.wants him to go by bike

D.wants to go with him

3.Why does Mike stand by the street?

A.He is waiting for the cars.

B.He doesn't want to cross the street.

C.He liks watching cars

D.He is waiting for his mother

4.How long does Mike stand by the street?

A.Half an hour.

B.Two hours.

C.Ten minutes

D.About one hour

5.From the passage(短文)we can know Mike isn's a     boy.

A.friendly

B.ugly

C.clever

D.cute

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1945年10月12日,西安《秦风日报》《工商日报》联合发表社论说:“分裂内战的阴霾可望由此扫清,和平建国的时代可望于兹开始,因而八年抗战的鲜血也将不至于白流,这是中 * * 的福音!这是中国人民的胜利!”这篇社论出现的背景是(  )

A.《双十协定》的签署

B.《国内和平协定》的签署

C.《中国人民政治协商会议共同纲领》的通过

D.抗日战争的胜利

题型:选择题

直线型尖轨左右开道岔可以通用。

题型:选择题

简单算术平均数所以简单是因为()

A、所计算的资料未分组

B、所计算的资料已分组

C、各变量值的次数不同

D、各变量值的次数都是1

E、各变量值的次数相同

题型:选择题

SLZ色谱检测仪中全烃和烃组分检测器都用()。

A、TCD

B、火焰光度计

C、黑白元件

D、FID

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