KClO3和KCl的混合物中含KCla克,加热分解完全后,KCl的质量是2a克,

题型:选择题

问题:

KClO3和KCl的混合物中含KCla克,加热分解完全后,KCl的质量是2a克,则原混合物中KClO3和KCl的质量比约是(  )

A.1:1

B.2:1

C.1.64:1

D.1.5:1

考点:化学反应方程式的计算
题型:选择题

Dear Tom,

How are you? I'm at a new school this term. And I'm writing to tell you about my school. My new school is big and nice. There are one thousand and four hundred students and one hundred and forty teachers at my school. I like the teachers. They are very kind to me. My classmates are very friendly too. They teach me Chinese and l teach them English There are trees, flowers and green grass at 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 play football or basketball with my classmates. Sometimes I stay at home and watch TV. Sometimes I go shopping with my father and mother. We all like China.

Please write to me soon!

Yours,

Jack

小题1:Jack is at a/an _______school.

A.English

B.Chinese

C.small

D.Japanese小题2:There are_______ students and _______ teachers at 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.doesn't get on well with

B.doesn't like

C.makes good friends with

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

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.

题型:选择题

19世纪中期随着工业革命的完成,自由主义思潮兴起,这反映在科学领域就是

A.牛顿完成力学体系

B.达尔文确立进化论

C.伽利略的实验研究方法

D.爱因期坦提出相对论

题型:选择题

下列命题是真命题的是(   )

A.对角线相等且互相垂直的四边形是菱形

B.有一边与两角相等的两三角形全等

C.对角线相等的四边形是矩形

D.有一组邻边相等且垂直的平行四边形是正方形

题型:选择题

CT可以检出的最少心包积液量是()

A.30ml

B.40ml

C.50ml

D.60ml

E.70ml

题型:选择题

下图示意世界某区域,下表为图中甲、乙两地的各月降雨量表(单位:毫米)阅读图表完成下列问题。

描述该区域的地形特征。

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