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【单选题】
一空间几何体的三视图如图所示，其中正视图与俯视图均为边长为2的正方形， 侧视图为腰长为2的等腰直角三角形，则该几何体的体积为（ ）A.
8
B.
4
C.
D.
正视图 侧视图 俯视图
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举一反三
【单选题】I (would rather) you (don't) (make any comment) (on) this problem.
A.
would rather
B.
don't
C.
make any comment
D.
on
【单选题】一台三相感应电机接于频率为 50Hz的电网,运行转速为735r/min ,此时转差率为( ),转子电动势的频率为( ),为( )运行状态 。
A.
0.02、1Hz、电动机
B.
0.02、50Hz、电动机
C.
-0.02、1Hz、发电机
D.
-0.02、50Hz、发电机
【简答题】-- I don’t know _______ during the summer vacation. Any advice? -- How about doing some part-time jobs? A. what should I do B. where should I go C. what I should do D. where I should ...
【简答题】价值论的核心问题之一是确定人存在的_____及其标准。
【单选题】听力原文：W：You must enjoy danger，I mean，you wouldn't be a fireman if you didn't，would you? M：I don't know about that．I had a very frightening experience quite recently． Q：What is the man? (17)
A.
He is a safeguard.
B.
He is a fireman.
C.
He is a policeman.
D.
He is a racing-driver.
【单选题】______ you do the experiment carefully, you would make discoveries others wouldn’t make.
A.
Should
B.
Would
C.
Could
D.
Might
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