6KV母线由工作电源倒至备用电源如何操作？

People often like collecting things. Collecting stamps, books, pictures and pens are some common hobbies. I know many kinds of collections, but do you know the collection of clocks? My friend Mr. Clock, a short man, has the hobby. He has one thousand five hundred clocks.

There are clocks here and there in his house. You can see lots of clocks on the shelves. As there is not enough room for so many clocks, the man has to put clocks into some boxes under the beds in his house .

Mr. Clock likes his large collection of clocks, but his wife , Mrs. Clock does not enjoy them at all. She complains (抱怨) every day because she has to do much work, for it is not easy to clean hundreds of clocks. She also complains about the noise. Each clock keeps a different time. So she can hear the chimes almost any time day and night. There is something even worse. With so many clocks around, she is never able to know the correct time !

小题1:Mr. Clock likes collecting _________.

A．stamps

B．pictures

C．watches

D．clocks小题2:Mr. Clock collected about _________ clocks.

A．1,050

B．1,500

C．1,550

D．5,010小题3:The underlined word “chimes ” means________ in the passage.                  

A．报点声

B．钟摆

C．温度

D．刻度小题4:Mrs. Clock complains every day because _______.

A．she has to clean many clocks

B．she can hear the chimes any time at home

C．she can’t know the correct time

D．A, B and C小题5:From the passage we know __________________.

A．all the clocks in Mr. Clock’s home tell the same time

B．Mr. Clock enjoys collecting the clocks，but Mrs. Clock doesn’t like it at all

C．no clock works well in their house

D．Mr. Clock only put the clocks on the shelves

下列各项中，被称为“一源三歧”的是（）。

A.任脉、督脉、阳维脉

B.任脉、督脉、阳维脉

C.任脉、带脉、冲脉

D.任脉、督脉、带脉

E.任脉、督脉、冲脉

为治项背强痛之要药的是（）

A．薄荷

B．牛蒡子

C．蔓荆子

D．蝉蜕

E．葛根

一项科学调查结果显示，近十年来，中国人每天食用的食物中所含盐分和糖分的量显著增加，从而使得高血压和糖尿病的发病率也升高了。但中国人的平均预期寿命却在这十年中提高了2.5岁，并且这一数据还有持续提高的趋势。
如果以下陈述为真，哪一项最有助于解释上述平均预期寿命的不断提高______

A．中国人热衷的运动，比如打太极拳、打乒乓球等有助于预防高血压、糖尿病等慢性病
B．在世界其他国家，人们的平均寿命预期在近十年来的增速要比十年以前的增速慢
C．人们习惯食用的杂粮、豆制品等食物可以降低患高血压和糖尿病的风险
D．近十年来，中国高血压和糖尿病增加的数量小于其他致人死亡病例减少的数量

如何防止烧损家用电器？