当工件加工余量较大时，应采用（）仿形加工。A、表面往复行切 B、深度分层行切 C、周进行

“How can I learn English well?” This is a question many students ask. In my opinion, the most effective way is to learn lessons by heart. If you can recite the text and write it out, you’ve learned it fairly well. And if you can tell, in your own words, what the lesson says you’re a very successful learner indeed. Your English will be quite perfect.

This is a difficult task. However, if you try to learn by heart only part of each lesson, you’ll find it not half so hard as you might have thought.

Learning this way, you will make rapid progress. Of course, writing is also necessary. It helps you a lot on our way to success in English.

Equally important is to feel the language. You should be able to laugh at jokes and be shocked at bad news. When using English, try to forget your mother tongue. Instead of helping you, your own language gets in your way. So, never try to see English through translation.

小题1:In the writer’s opinion, the most effective way in learning English is ________.

A．to practise speaking, writing and feeling it

B．to forget your own native language

C．to translate everything into his own language

D．to memorize the English words and grammatical rules小题2:“Instead of helping you, your own language gets in your way.”This sentence means that memorizing your own language can ________.

A．help you to study English well

B．stop you mastering English

C．make English easy to learn

D．help you notice mistakes小题3:Equally important is to feel the language. “to feel the language” here means________.

A．to get a knowledge of English by touching

B．to be able to read and write English

C．to translate English into your own by imagining

D．to be able to experience the rich sensation of the language

直流控制保护装置的自诊断覆盖率应达到（）。

A.100%

B.95%

C.99%

D.80%

货币乘数也称货币扩张系数，是用以说明货币供给总量与( )之间倍数关系的一种系数。

A．本位货币
B．基础货币
C．信用货币
D．需求总量

无花果的花序为隐头花序，不适宜虫媒传粉，所以无花果为风媒花植物。

三相对称电流通入三相异步电动机定子绕组，将在气隙产生（）磁场。

A.旋转

B.固定

C.脉动

D.交变