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【单选题】
向中药的酸水提取液中,加入碱水,沉淀出的是()A.
苷类
B.
叶绿素
C.
树脂
D.
游离生物碱
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知识点：
皮皮学刷刷变学霸
举一反三
【单选题】We don't understand the problem _____ this is the best choice.
A.
that
B.
what
C.
why
D.
whether
【单选题】We don't understand the passage ______ there are a few new words in it.
A.
and
B.
unless
C.
because
【简答题】社会心理学家凯尔曼提出的态度改变需要经历的三个阶段( )、( )、( )。
【简答题】分离过程可分为 ( )和传质分离两大类。其中传质分离过程的特点是过程中有( )现象发生。常见的传质分离过程有( ) ,( ) ,( )。
【单选题】We don't understand how the manager could try to escape his ______.
A.
tasks
B.
responsibility
C.
duty
D.
work
【简答题】阅读理解。 When we don't understand each other's language, we talk with the help of signs. A Frenchman was once traveling in England. He could not speak English at all. One day he went into a restaurant an...
【单选题】We don't understand why you object to with us.
A.
him coming
B.
that he comes
C.
his coming
D.
that he come
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