下列离子方程式,书写正确的是() A.盐酸与碳酸钡反应 CO32-+2H+==C

题型:选择题

问题:

下列离子方程式,书写正确的是(   )

A.盐酸与碳酸钡反应 CO32-+2H+==CO2↑+H2O

B.硫酸铜溶液中滴加氢氧化钡溶液

Ba2++2OH-+Cu2++SO42-==BaSO4↓+Cu(OH)2

C.硝酸银溶液中加入铜粉 Ag++Cu==Cu2++Ag↓

D.铁与稀盐酸反应 2Fe+6H+==2Fe3++3H2

考点:离子方程式
题型:选择题

When you have a cold, a headache, a cough, or you can’ go to sleep, who are you going to ask for help ? Perhaps your answer is to go to the doctor for help, or to get some medicine from the drugstore. Another idea is to ask your grandparents to get some simple ways to solve these problems. Here are some good ways to feel better from some old people.

If you have a cold, you should eat hot chicken soup. Some people drink hot water, juice or milk.

If you have a headache, you may put some ice or a cold cloth(布) on your head, or cool your face with cold water. It’s also a good idea to put your hands into hot water for several minutes. Also, you shouldn’t read anything or watch TV.

If you have a cough, you may drink hot water or eat some honey.

If you can’t get to sleep, you may drink a glass of warm milk. It’s also a good idea to take a bath.

小题1: If you have a cold, you can eat hot chicken soup, drink ________, juice or milk.

A. hot water                   B. cold water                 C. wine

小题2: If you have a headache, you can leave your hands in hot water for _______ .

A. several hours                B. a few minutes            

C. a little minutes

小题3:If you have a cough, it’s a good idea for you to drink hot water or eat ________ .

A. some vegetables             B. some fruit                  C. some honey

小题4: If you can’t get to sleep, _________ can help you.

A. taking a warm bath           B. running                    C. drinking water

小题5:What is the best title of the article ?

A. How to keep healthy ?         B. You should keep healthy.

C. Simple ways for health problems.

题型:选择题

如图,AD=DB=DC=10厘米,那么,图中阴影部分的面积是多少平方厘米()

A.109

B.110

C.107

D.110.25

题型:选择题

人民内部矛盾也具有对抗性。

题型:选择题

用锤子不断敲击一段铜线后,用手触摸铜线会有什么感觉?这是什么原因?

题型:选择题

等渗性缺水短期内出现血容量明显不足时,提示体液丧失达体重的()

A.3%

B.3.5%

C.4%

D.4.5%

E.5%

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