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问题 单项选择题

造成下列乳剂不稳定的原因是

分层( )

A．Zeta电位降低
B．分散相与连续相存在密度差
C．微生物及光、热、空气等作用
D．失去乳化作用
E．乳化剂类型改变

答案

参考答案：B

单项选择题

“It is declared that this shipment does not contain any wood packing materials．”与这句话意思接近的是 （）

A．We declare that no wood packing material was used in this shipment

B．No declaration was made whether wood packing materials had been used or not

C．If you don’t make any declaration，we will not use any wood packing material

D．We will not use any wood packing material since you have prodded us a declaration of no-wood pack- ing material
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单项选择题

以下哪一项不是胆道感染的鉴别疾病：

A．消化道穿孔

B．急性胃肠炎

C．急性阑尾炎

D．急性胰腺炎

E．胆道蛔虫病
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