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【简答题】
在微生物培养过程中，引起培养基pH值改变的原因主要有______和______等。
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皮皮学刷刷变学霸
举一反三
【单选题】关于乳剂中乳化膜的叙述错误的是
A.
吐温类形成的乳化膜对水相界面张力降低得多
B.
阿拉伯胶作为乳化剂，形成的是单分子层乳化膜
C.
硅皂土等作为乳化剂，形成的是固体微粒乳化膜
D.
乳化膜可阻止乳滴合并
【单选题】Among the left handers, ______.
A.
few are men
B.
most of them are women
C.
half of them are men
D.
two thirds are men
【简答题】A．Most of them are boarding schools. B．None of them take day-pupils. C．Pupils can be admitted without any exam. D．Most of them have their own preparatory schools.
【单选题】How about the machines used in the factories?
A.
Most of them are made in China.
B.
Most of them are imported from abroad.
C.
They made most of them by themselves.
D.
They made all of them by themselves.
【简答题】向心轴承主要承受 载荷
【单选题】Which of the following is TRUE of those young computer 'hackers' ?
A.
Most of them are top students majoring in computer programming.
B.
For them, computer programming is the sole purpose for their life.
C.
They can always stay with the computer at the center without eating and sleeping.
D.
They lose all of their friends because of their deep 'love' for the computer.
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