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【单选题】
阶梯轴的车削过程中参照《机械加工工艺手册》选取切削速度,考虑到机床的刚性和强度,精加工时选用主轴转速为( )
A.
300r/min
B.
600r/min
C.
800r/mi
D.
1200r/min
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举一反三
【单选题】下列哪种药物在老年人体内的排泄减少
A.
地尔硫卓
B.
哌替啶
C.
地西泮
D.
氨苯蝶啶
E.
维拉帕米
【单选题】Which of the italicized parts indicates CONTRAST?
A.
She opened the door and quietly went in.
B.
Victoria likes music and Sam is fond of sports.
C.
Think it over again and you’ll get an answer.
D.
He is somewhat arrogant, and I don't like this.
【单选题】Which of the underlined parts indicates CONTRAST?
A.
Press the button and the door opens by itself.
B.
Many of the papers are good, and these are the best.
C.
She has wronged me, and I wish to do her justice.
D.
They've finished half of it, and that's not bad.
【单选题】下列哪种药物在老年人体内的排泄减少( )
A.
地尔硫革
B.
哌替啶
C.
地西泮
D.
氨苯蝶啶
E.
维拉帕米
【单选题】Which of the following parts answering the question of “What did I find?” ( ) .
A.
Introduction
B.
Methodology
C.
Results
D.
Conclusion
【判断题】以螺旋弹簧为弹性单元的悬架系统中无需装设导向机构
A.
正确
B.
错误
【单选题】图示电路的开关断开后,电感电流iL(0+) 等于()A
A.
5
B.
2.5
C.
-5
D.
-2.5
【单选题】Which of the italicized parts is used as an object complement?
A.
I want none of you involved in the scandal.
B.
Mary seems worried at the news.
C.
The seam(接缝)came unsewn.
D.
His wallet appeared stolen.
【简答题】为什么酶活性中心的Cys残基更容易与碘代乙酸起反应?
【单选题】Which of the underlined parts indicate CONTRAST?
A.
Press the button and the door opens by itself.
B.
Many of the papers are good, and these are the best.
C.
She has wronged me, and I wish to do her justice.
D.
They've finished half of it, and that's not bad.
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