当电涡流线圈靠近非磁性导体(铜)板材后,线圈的等效电感L()。 A.不变 B.增大

题型:单项选择题

问题:

当电涡流线圈靠近非磁性导体(铜)板材后,线圈的等效电感L()。

A.不变

B.增大

C.减小

D.以上都可能

考点:测试技术测试技术题库
题型:单项选择题

阅读理解。

     You know that the sea is salty. You can taste the salt. Some parts of the sea are saltier than other

parts. There is one sea, called the Dead Sea, which is very salty. It is so salty that swimmers cannot

sink! Fish cannot live in the Dead Sea. What a strange sea!

     The sea can be very cold. Divers, who dive deep down in the sea know this. On the top the water

may be warm. When the diver goes downwards, the sea becomes colder and colder. Another thing

happens. When the diver goes deeper, the water presses up on him. So the diver has to wear clothes

made of metal. Some people who want to go very deep use a very strong diving ship!

1. The water in the Dead Sea is _____ the water in other seas.

A. as salty as                    

B. not so salty as    

C. much saltier than              

D. more salty than

2. Fish cannot live _____ .

A. in the sea                    

B. in the river    

C. in the lake                  

D. in the Dead Sea

3. If you dive deep down into the sea, you will have to wear clothes _____.

A. made of metal                

B. made of iron  

C. made of cotton                

D. made of nylon

4. The water on the top of the sea is _____that at the bottom of it.

A. much warmer than              

B. much colder than    

C. as warm as                    

D. as cold as

5. Which of the following is TRUE?

A. Everyone can't swim in the sea.    

B. No one can swim in the river.

C. Each one can swim in the lake.      

D. Everyone can swim in the Dead Sea.

题型:单项选择题
在括号里填上合适的数.
5
8
=
30
()
24
42
=
()
7
4
()
=
48
60
题型:单项选择题

汤患者,女,35岁,反复尿频、,尿急、尿痛2年,小便淋沥不已,遇劳即发,时作时止,神疲乏力,腰膝酸软,舌质淡,脉细弱。

治疗选用方剂是()

A.知柏地黄丸

B.无比山药丸

C.六味地黄丸

D.膏淋汤

E.补中益气汤

题型:单项选择题

栈底至栈顶依次存放元素A、B、C、D,在第五个元素E入栈前,栈中元素可以出栈,则出栈序列可能是______。

A.ABCED

B.DBCEA

C.CDABE

D.DCBEA

题型:单项选择题

饮食方式包括饮食姿势、饮食用具和()三部分。

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