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【单选题】
X射线衍射仪的光源是 。A.
高速运动的电子
B.
特征X射线
C.
连续X射线
D.
紫外光
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皮皮学刷刷变学霸
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【简答题】在绝大多数时候，市场中理性和（ ）的投资者都是起作用的。
【单选题】听力原文：W: You look exhausted this morning, Steve. M: I am pretty tired. I stayed up nearly all night getting ready for a mid-term exam this morning. W: Have you gotten the results of the test yet? M: Ye...
A.
It was an improvement.
B.
It was disappointing.
C.
It was unfair.
D.
It was satisfying.
【单选题】一住店客人未付房钱即要离开旅馆去车站，旅馆服务员见状揪住他不让走，并打电话报警。客人说：“你不让我走还限制我自由，我要告你们旅馆，耽误了我乘火车要你们赔偿。”旅馆这样做的性质应如何认定?( )
A.
属于侵权，系侵害人身自由权
B.
属于侵权，系积极侵害债权
C.
不属于侵权，是行使抗辩权之行为
D.
不属于侵权，是自助行为
【单选题】听力原文：W: You look exhausted this morning, Steve. M: I am pretty tired. I stayed up nearly all night getting ready for a midterm exam this morning. W: Have you gotten the results of the test yet? M: Yes...
A.
It was an improvement.
B.
It was disappointing.
C.
It was unfair.
D.
It was satisfying.
【简答题】呃逆在唐代以前称“___________”;嗳气古称“___________”。
【单选题】听力原文：W: You look exhausted this morning, Peter. M: I am pretty tired. I stayed up almost all night getting ready for the final exam this morning. W: Have you gotten the results of the test yet? M: Yes...
A.
It was an improvement.
B.
It was disappointing.
C.
It was unfair.
D.
It was satisfying.
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