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【多选题】
现代生活方式中的健康隐患有（）A.
环境破坏
B.
营养过剩
C.
运动不足
D.
生活危险
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反馈参考答案：
举一反三
【单选题】与120°边相同的角是( )
A.
-600°+k·360°,k∈Z
B.
-120°+k·360°,k∈Z
C.
120°+(2k+1)·180°,k∈Z
D.
660°+k·360°,k∈Z
【简答题】润滑脂的主要物理性能指标是 _______________ 和 _______________ ;动压润滑轴承润滑油最重要的性能指标为 ____________________ 。
【单选题】2 What are the two general levels of usage for language?
A.
Polite and impolite language.
B.
Textbook and conversational language.
C.
Formal and informal language.
D.
Spoken and written language.
【单选题】-What！Ten minutes ago you told me there were no rooms. You just gave one to that man! -You ________ to understand, sir. That man has a reservation. [ ]
A.
didn't seem
B.
don't seem
C.
haven't seemed
D.
hadn't seemed
【单选题】2 What are the two general levels of usage for language? A. Polite and impolite language. B. Textbook and conversational language. C. Formal and informal language. D. Spoken and written language.
A.
B.
C.
D.
D
【单选题】与120°终边相同的角是
A.
-600°+k×360°,k∈Z
B.
-120°+k×360°,k∈Z
C.
120°+(2k+1)×180°,k∈Z
D.
660°+k×360°,k∈Z
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