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【单选题】
视网膜感光最敏锐的部位在A.
视神经盘周围
B.
中央凹
C.
脉络膜
D.
视网膜
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皮皮学刷刷变学霸
举一反三
【单选题】Students should do everything they can _______ their study. [ ]
A.
improve
B.
to improve
C.
improving
D.
improved
【简答题】视距测量误差的主要来源有大气竖直折光的影响距丝的()、()。
【简答题】To cure the snoring problems, surgery can be used to improve ______.
【简答题】测量误差的主要来源有( )误差、( )误差、理论误差和方法误差、( )误差四种。
【简答题】测量误差的主要来源有 、 、 、 和
【单选题】男性，50岁，因十二指肠溃疡急性穿孔行胃大部切除，毕Ⅱ式，术后第6天突然出现上腹部剧烈疼痛，局部压痛、肌紧张及反跳痛，继而发热38.2℃，应首先考虑
A.
十二指肠残端破裂
B.
近端空肠段梗阻
C.
急性肠梗阻
D.
急性胰腺炎
E.
急性胆囊炎
【单选题】It can be inferred from the passage that______.
A.
people can improve their sleeping if they sleep more hours than usual
B.
in order to sleep more soundly at night, people can take a nap at noon
C.
the nine-step treatment for insomniacs was developed by Arthur Spielman
D.
approximately 15 percent of the people are suffering insomnia
【单选题】It is clear that your ____ English will greatly improve if you can practice ____ wherever you can.
A.
speaking; speaking
B.
speaking; spoken
C.
spoken; speaking
D.
spoken; spoken
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