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【单选题】
女性，42岁。农民，劳累后气促、咳嗽1个月入院，查体：心界不大，心率90次/min，律齐，P2＞A2．心尖部可疑舒张期杂音，为进一步明确诊断。首选下列哪种检查
A.
心电图
B.
心脏X线检查
C.
超声心动图
D.
运动负荷试验
E.
心肌核素扫描
拍照语音搜题，微信中搜索"皮皮学"使用
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维生素D和钙
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硫胺素
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【单选题】I ’m deeply impressed by the great musical effect of this theatre. Even if you sit in the farthest seat, the music is still().
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audible
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inaudible
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credible
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【单选题】I’m impressed with his determination. When he had a problem to solve, he  _____ work at it until he found an answer.
A.
would
B.
might
C.
must
D.
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【单选题】婴幼儿佝偻病主要是由（ ）缺乏引起的。
A.
vitamin A
B.
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【单选题】(2014·南京一模)________time at Beijing Normal University，I’m very impressed with the quality of the teachers and students.
A.
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B.
Being spent
C.
To spent
D.
Spending
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【单选题】I'm really impressed.
A.
It congratulates someone on what they have done.
B.
It encourages someone to improve their performance.
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【单选题】婴幼儿佝偻病主要是由( )缺乏引起的
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【单选题】I ’m deeply impressed by the great musical effect of this theatre. Even if you sit in the farthest seat, the music is still().
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A.
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