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【判断题】
( ) 强力切削大模数多头蜗杆时,整个车削过程分粗车、半精车三个步骤。A.
正确
B.
错误
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举一反三
【单选题】News Directions N1-1
A.
To debate on the use of elephants.
B.
To campaign against the use of elephants.
C.
To pop the champagne corks and rejoice.
D.
To stop using performing elephants.
【单选题】News 2 N2-3
A.
Americans built support for laws forbidding voter discrimination.
B.
Discrimination against African-American voters came to an end.
C.
Existence of discrimination in the United States continued.
D.
Activists helped clear the path he followed to the White House.
【多选题】防护装置的功能有
A.
防止人体任何部位进入机械的危险区触及各种运动零部件
B.
防止飞出物的打击、高压液体的意外喷射或防止人体灼烫、腐蚀伤害
C.
容纳接受可能由机械抛出、掉下、发射的零件及其破坏后的碎片
D.
在有特殊要求的场合，防护装置还对电、高温、火、爆炸物、振动、放射物、粉尘、烟雾、噪声等具有特别阻挡、隔绝、密封、吸收或屏蔽作用
【单选题】News 3 N3-5
A.
Participate in the Olympics.
B.
Participate in the Paralympics.
C.
Participate in a swimming contest.
D.
Participate in a basketball game.
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