有电容器C1=2μF,C2=4μF,将其并联后的电容是()。A.8 B.6 C.2

题型:单项选择题

问题:

有电容器C1=2μF,C2=4μF,将其并联后的电容是()。

A.8

B.6

C.2

D.4

考点:通信工程师固定电话维修固定电话维修题库
题型:单项选择题

可行性研究中一般应该以( )结论作为项目或方案取舍的主要依据。

A.技术分析
B.工艺分析
C.财务评价
D.国民经济评价

题型:单项选择题

根据短文内容补全句子

     Most children like watching TV. It's very interesting. By watching TV they can see and learn a lot and know many

things about their country and the world. Of course, they can also learn on the radio. But they can learn better and

more easily on TV. Why? Because they can hear and watch at the same time. But they can't see anything over the

radio. TV helps to open children's eyes. TV helps to open their brains(大脑), too. They can learn newer and better

ways of doing things. They may find the world is now smaller than before. Many children watch TV on Saturday

or Sunday evening. They are always busy with their lessons. But a few children watch TV every night. They go

to bed very late. They can't have a good rest. That's too bad.

1. Children __________ the programs on TV.

2. They can get to know the world by __________ TV.

3. They like TV programs __________ than radio programs.

4. They can learn more easily when they can hear and watch at the __________ time.

5. There are some teaching programs on the __________, too.

6. TV helps to __________ children's eyes and their brains.

7. That's the new __________ of working out the problem.

8. With TVs and radios around us, the world is getting __________.

9. Children can't watch TV for too long because they are always __________ with their lessons.

10. It is __________ for children to watch TV every night.

题型:单项选择题

正位胸片中,颈部两侧向下延伸达肺尖内侧的纵行高密度阴影为()

A.皮下脂肪

B.胸大肌

C.胸锁乳突肌

D.锁骨上皮肤皱褶

E. * *

题型:单项选择题

有关含铁血黄素尿的说法,下列不正确的是()

A.慢性血管内溶血时少见

B.Rous试验可检出

C.急性溶血初期可阴性

D.Hb在肾小管上皮细胞内分解而成

E.阴性不能排除血管内溶血

题型:单项选择题

下图中,风带、气压带的画法正确的是

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