What kinds of actuator are there in actuation system?

第1题

A first-person narrator is reliable because what "I" said is the direct experiences.

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第2题

完形填空。????Making friends is a skill. Like most ...

完形填空。

Making friends is a skill. Like most skills,it improves with1. If you want to meet people and make

friends,you must be able to take some2.You must first go3there are people. You won't make

friends staying home alone.

Join a club or a group,for talking with those who4the same things as you do is easier.5join

someone in some activities.

Many people are6when talking to new people.7meeting strangers means facing the

unknown.

And it's human8to feel a bit uncomfortable about the unknown.9of our fears about dealing

with new people come from doubts about ourselves. We10other people who are judging us finding

us too tall or too' short , too this or too that.11don't forget that they must be feeling the same way.

Try to accept (接受)yourself12you are and try to put the other person at ease. You'Il never feel more

13.

Try to act self-confidently (自信) even if you don't feel that way. When you enter a room full of14,

such as a new classroom,walk tall and straight, look15at other people and smile.If you see

someone you'd like to16something to,don't wait for the other person to17a conversation.

Just meeting someone18doesn't mean that you will make friends with that person. Friendship

is19on the mutual (相互) liking and "give and take".It20time and effort to develop.

( )1. A. age

( )2. A. photos

( )3. A. where

( )4. A. have

( )5. A. So

( )6. A. afraid

( )7. A. Above all

( )8. A. nature

( )9. A. None

( )10. A. suggest

( )11. A. And

( )12. A. what

( )13. A. dangerous

( )14. A. strangers

( )15. A. anxiously

( )16. A. speak

( )17. A. start

( )18. A. strange

( )19. A. depended

( )20. A. takes

B. practice

B. action

B. that

B. share

B. Or

B. excited

B. In all

B. need

B. Few

B. consider

B. Therefore

B. who

B. useful

B. people

B. friendly

B. talk

B. make

B. new

B. laid

B. spends

C. skill

C. place

C. which

C. keep

C. However

C. nervous

C. To all

C. habit

C. Most

C. doubt

C. But

C. that

C. familiar

C. classmates

C. curiously

C. say

C. end

C. familiar

C. taken

C. costs

D. everything

D. troubles

D. when

D. like

D. But

D. familiar

D. After all

D. custom

D. All

D. imagine

D. So

D. as

D. comfortable

D. students

D. directly

D. tell

D. hold

D. tiresome

D. based

D. needs

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第3题

What kind of words are not the key information in a choice? （）

A、Nouns

B、Verbs

C、Articles

D、Numerals

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第4题

— What will the land be used for？— _____.[????]A. ...

— What will the land be used for？

— _____.

[ ]

A. To plant young trees

B. Young trees will be planted

C. They will plant young trees

D. Planting young trees

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第5题

The key to why an AC asynchronous motor spins is .

A、induction

B、resistance

C、capacity

D、piezoelectricity

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第6题

DC motors have that wear out and need replacing from time to time.

A、rotor

B、commutator

C、carbon brushes

D、stator

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第7题

How to control the rotor rotation speed and rotation direction of DC motor?

A、H Bridge

B、slip ratio

C、phase number

D、Pulse Width Modulation

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第8题

The step angle of stepping motors is determined by .

A、frequency of pulse

B、number of pulse

C、number of phase

D、number of rotor teeth

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What kinds of actuator are there in actuation system？