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【单选题】
乳化剂属于热力学不稳定的非均相分散体系。制成后，放置过程中容易出现分层、絮凝等不稳定现象。若出现的分层现象后能恢复原状，其原因是A.
分散相乳滴(Zeta)电位降低
B.
分散相与连续存在有密度差
C.
乳化类型改变
D.
乳化剂失去乳化作用
E.
微生物的作用
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【简答题】Human activity could bring about melting of the ______ in this century.
【单选题】The only trouble with young drivers is that
A.
they tend to own sports ear.
B.
they are too proud of their ears.
C.
they soon become like the older ones.
D.
they think they are on the battlefield.
【简答题】Don't pretend to know. You don't know it. Don't pretend not to know. You really know it.
【单选题】—Remember not to pretend to know what you don’t know. — _____. My last lesson is still fresh.
A.
No, I will
B.
No, I won’t
C.
Yes, I won’t
D.
Yes, I will
【单选题】All the human beings speak a certain kind of language and more. But have you ever ob serve the process of an infant's beginning of learning a language from its parents? What is the importance of a lan...
A.
he wanted to prove that children are born with the ability to speak.
B.
he ignored the importance of mothering to the infant.
C.
he was unkind to the nurses.
D.
he wanted to see if the children could die before they reached the age of one.
【单选题】The best statements about human error is( )
A.
Error is an inevitable part of human behavior
B.
As long as we pay more attention, and operate accurately, we can avoid the error
C.
Only a small part of accidents were caused by human error
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