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【单选题】
关于冷冻干燥的叙述错误的是A.
预冻温度应在低共熔点以下10～20℃
B.
速冻法制得结晶细微，产品疏松
C.
速冻引起蛋白质变性的几率小，对于酶类和活菌保存有利
D.
慢冻法制得结晶粗，但有利于提高冻干效率
E.
粘稠、熔点低的药物宜采用一次升华法
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皮皮学刷刷变学霸
举一反三
【简答题】The doctor saw at the first sight that the lady (suffer) ________ from heart trouble.
【简答题】'I saw the doctor taking off his mask and laying a hand on her shoulder. 'implies that the doctor took the woman as the man's ______.
【单选题】The doctor ____ my eyes carefully and told me that there was nothing serious with them. [ ]
A.
saw
B.
examined
C.
checked
D.
controlled
【单选题】After the patients went into the office,＿＿working.
A.
only a doctor did they see
B.
only a doctor saw they
C.
only a doctor they saw
D.
only a doctor had they seen
【简答题】扩散间生产流程及返工流程是什么？操作时应注意哪些事项？
【简答题】道岔护背距离应不得()mm。
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