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【简答题】
一吊车底板上放一质量为10 kg的物体,若吊车底板加速上升,加速度为a = 3+5t,则2 s内吊车底板给物体的冲量大小为 Nm;2 s内物体动量的增量大小为 Nm.
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举一反三
【单选题】The rough draft of any research report should be edited to ______ that all data are correctly presented, that all equipments are listed, that all results are properly de-tailed.
A.
ensure
B.
assure
C.
secure
D.
insure
【多选题】《中职校教师职业道德规范》中“热爱职业教育”指的是
A.
忠诚于职业教育事业，爱岗敬业，教书育人
B.
树立正确教育思想，全面履行教师职责
C.
自觉遵守学校规章制度
D.
认真完成教育教学任务
E.
积极参与教育教学改革
【单选题】In the article, the word 'rectify' in paragraph 2, line 6 is closest in meaning to
A.
correct
B.
inspect
C.
claim
D.
reimburse
【单选题】According to WTO Director-General Pascal Lamy, which of the following statements is correct?
A.
The differences are so wide that it is impossible for the members to reach an agreement.
B.
We cannot afford to take such big risks to reach an agreement.
C.
The agreement is reachable despite of wide differences.
D.
Risks have to be taken to control anti-globalization activities.
【简答题】Many language learners think their pronunciation is good enough because their teacher doesn’t correct them too often or because other students can 36 them. Pronunciation is the area which is 37 the le...
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