皮皮学，免费搜题
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搜题
【单选题】
中药材专业市场只能销售A.
中药饮片
B.
生物制品
C.
中成药
D.
中药材
拍照语音搜题，微信中搜索"皮皮学"使用
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皮皮学刷刷变学霸
举一反三
【单选题】—I visited China year. —That interesting.
A.
should have been
B.
can be
C.
must be
D.
must have been
【简答题】血栓形成的条件
【简答题】指出循环热效率公式 η =1-Q2/Q1和 η =1-T1/T2 各自适用的范围 (T1 和T2 是指冷源和热源的温度 )
【单选题】I would have gone to visit him in the hospital had it been at all possible, but I ______ fully occupied the whole of last week.
A.
were
B.
had been
C.
have been
D.
was