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【单选题】
数列 收敛 是数列有界的( )
A.
无关条件
B.
充要条件
C.
充分条件
D.
必要条件
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举一反三
【单选题】'_____ has Mary been playing the piano?' 'For three and a half hours.' [     ]
A.
How soon
B.
How long
C.
How far
D.
How often
【简答题】Economics is no different. Supply, demand, elasticity, comparative advantage, consumer surplus, deadweight loss--these terms are part of the economist ’s language. In the coming chapters, you will enc...
【判断题】旋转技巧是一个舞者必须掌握的动作技术,它既美化了舞蹈作品,又提升了人体前庭器官稳定控制肌体平衡的能力。
A.
正确
B.
错误
【判断题】旋转技巧是一个舞者必须掌握的动作技术,它既美化了舞蹈作品,又提升了人体前庭器官稳定控制肌体平衡的能力。
A.
正确
B.
错误
【单选题】患者,女性,38岁,因外阴瘙痒,白带异常就诊,医生诊断为外阴阴道假丝酵母菌病。 93. 对于该病的治疗,适合阴道冲洗的溶液为( C)
A.
1% 乳酸溶液
B.
2% 乳酸溶液
C.
2-4% 碳酸氢钠溶液
D.
5% 醋酸溶液
E.
0.9% 氯化钠溶液
【单选题】吗啡引起低血压的原因
A.
阻断 α 受体
B.
抑制去甲肾上腺素释放
C.
抑制血管平滑肌
D.
激动β受体
E.
激动M受体
【单选题】—How long has Mary ______ Johnson? —I don’t know. I even don’t know that they had ______.
A.
been married with; married
B.
married with; married
C.
married to; married
D.
been married to; got married
【单选题】How long has Mary been away?
A.
For two years
B.
For three years
C.
For five years
【单选题】How long has Mary been like this?
A.
Since two days ago.
B.
Since three days ago.
【判断题】C307 车型上使用的发动机有 1.6L 和 1.8L 两种排量。
A.
正确
B.
错误
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