RC桥式振荡器的振荡频率取决于()电路的R、C。 A.同相放大器 B.反相放大器 C

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问题:

RC桥式振荡器的振荡频率取决于()电路的R、C。

A.同相放大器

B.反相放大器

C.选频网络

D.放大器内部

考点:电子设备装接工电子设备装接工(综合练习)电子设备装接工(综合练习)题库
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计算下列各式:
(1)0.064-
1
3
-(
7
8
)0+16
3
4
+(
2
33
)6

(2)(log43+log83)(log32+log92).
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推土机的操纵性是指操纵推土机时的准确程度以及操作是否简使,轻巧等。

题型:单项选择题

阅读理解。

                                                                   How to Be a Winner

Sir Steven Redgrave

Winner of 5 Olympic Gold Medals

     "In 1997 I was found to have developed diabetes (糖尿病). Believing my career (职业生涯) was over,

I felt extremely low. Then one of the specialists said there was to no reason why I should stop training and

competing. That was it-the encouragement I needed. I could still be a winner if I believed in myself. I am

not saying that it isn't difficult sometimes. But I wanted to prove to myself that I wasn't finished yet. Nothing

is to stand in my way."

Karen Pickering

Swimming World Champion

     "I swim 4 hours a day, 6 days a week. I manage that sort of workload by putting it on top of my diary.

This is the key to success-you can't follow a career in any field without being well-organized. List what you

believe you can achieve. Trust yourself, write down your goals for the day, however small they are, and you'll

be a step closer to achieving them."

Kirsten Best

Poet & Writer

     "When things are getting hard, a voice inside my head tells me that I can't achieve something. Then, there

are other distractions, such as family or hobbies. The key is to concentrate. When I feel tense, it helps a lot to

repeat words such as 'calm', 'peace' or 'focus', either out loud or silently in my mind. It makes me feel more

in control and increases my confidence. This is a habit that can become second nature quite easily and is a

powerful psychological (心理的) tool."

1. What does Sir Steven Redgrave mainly talk about?

A. Difficulties influenced his career.

B. Specialists offered him medical advice.

C. Training helped him defeat his disease.

D. He overcame the shadow of illness to win.

2. What does Karen Pickering put on top of her diary?

A. Her training schedule.                    

B. Her daily happenings.

C. Her achievements.                         

D. Her sports career.

3. What does the underlined word "distractions" probably refer to?

A. Ways that help one to focus.

B. Words that help one to feel less tense.

C. Activities that turn one's attention away.

D. Habits that make it hard for one to relax.

4. According to the passage, what do the three people have in common?

A. Courage.          

B. Devotion.         

C. Hard work.       

D. Self-confidence.

题型:单项选择题

本病例选方为

A.六味地黄汤

B.参附汤

C.归脾汤

D.补天大造丸

E.百合固金汤

题型:单项选择题

糖皮质激素可使肝糖原升高、血糖升高。

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