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【单选题】
引入装置所用密封圈的材料要用弹性好、不易老化、不易龟裂的橡胶材料或其他类似材料制成，其硬度达到硬度（）度。A.
35-55
B.
25-55
C.
15-55
D.
45-55
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举一反三
【单选题】he problem will be fully discussed at the meeting ______the next day.
A.
hold
B.
homing
C.
to be held
D.
held
【单选题】教育学涵盖众多学科,学前教育学、基础教育学、高等教育学、职业教育学是从哪个角度进行的学科划分?
A.
研究教育的学科视角
B.
教育活动的内在要素
C.
学校教育层次与类型
D.
教育研究中的常用方法
【简答题】A．He has some knowledge of the law. B．He had the same problem. C．He knows the owner. D．He can bring a lawsuit against the owner.
【简答题】A．He can't afford to buy the ticket. B．He needs a break from the math problem. C．He doesn't want to go to the opera. D．He'll meet the woman when he has finished the math problem.
【简答题】Though he might try ,he couldn't solve the problem.
【单选题】—I can’t help you with he problem, for I with my homework. —Thank you all the same.
A.
am occupying
B.
occupy
C.
am occupied
D.
was occupied
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