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【多选题】
盐酸、水杨酸、醋酸、酚的均化性溶剂是( )。A.
甲基异酮
B.
吡啶
C.
胺
D.
水
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反馈参考答案：
举一反三
【单选题】关于泵与风机的工作点,正确的说法是( )
A.
泵与风机性能曲线是由点组成的,组成泵与风机性能曲线上的每一个点,都是工作点
B.
管路性能曲线也同样是由点组成的,组成管路性能曲线上的每一个点,都是工作点
C.
泵与风机性能曲线与管路性能曲线的交点,才是工作点
D.
只有具有下降段的泵与风机性能曲线与与管路性能曲线的交点,才是工作点
【单选题】Fifty cases of Green Tea you sent us were found to be badly damaged. This was apparently attributable to ______packing.
A.
faulty
B.
large
C.
inner
D.
outer
【单选题】Fifty cases of Green Tea you sent us were found to be badly damaged. This was apparently attributable to _____ packing.
A.
outer
B.
superior
C.
domestic
D.
faulty
【单选题】Fifty cases of Green Tea you sent us were found to be badly damaged. This was apparently attributable to packing.
A.
inferior
B.
superior
C.
faulty
D.
mistake
【简答题】泵与风机的工作点:
【单选题】Fifty cases of Green Tea you sent to us were found badly damaged. This was apparently attributable to _ packing.
A.
right
B.
superior
C.
inferior
D.
wrong
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