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【单选题】
流行病学的实验性研究不包括
A.
社区干预试验
B.
人群现场试验
C.
临床试验
D.
病例对照研究
E.
类实验
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参考答案:
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】. _____ to Beijing, I would visit the Forbidden City where the emperors once lived.
A.
If should I get
B.
If I would get
C.
Should I get
D.
If I get
【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
【单选题】同一感受器内,由于刺激对感受器的持续作用而使感受性发生变化的现象是( )。
A.
感觉适应
B.
感觉对比
C.
联觉
D.
感觉的相互作用
【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 ...
【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】同一感受器内,由于刺激物对感受器的持续作用而使感受性发生变化的现象是( )。
A.
感觉适应
B.
感觉对比
C.
同时对比
D.
继时对比
【单选题】一台三相感应电机接于频率为 Hz的电网,运行转速为735 ,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
【单选题】由于刺激对感受器的持续作用而使感受性发生变化的现象是()
A.
联觉
B.
感觉后像
C.
感觉适应
D.
感觉对比
【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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