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【判断题】
对于那些极性不强,稳定性差的物质,可以用大树脂吸附来分离。目前已用于头孢菌素、 VB12、霉素等的提取,它可以弥补离子交换要脂的不足。A.
正确
B.
错误
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举一反三
【单选题】At the age of 46, George Orwell died in the University College Hospital, London. What did he die from?
A.
tuberculosis
B.
suicide
C.
heart attack
D.
car accident
【简答题】We are deeply saddened by the passing of Dr. Li Wenliang, one of the eight “whistle 1 ” ,who tried 2 his fellow doctors of the novel coronavirus when it first broke out in Wuhan, and died early on Fri...
【单选题】He suffered a serious( ) in the car crash,and died on the way to hospital.
A.
injury
B.
accident
C.
fall
D.
attack
【单选题】The man died in the hospital because _________
A.
he was too afraid of the nurse
B.
he was badly ill too
C.
his oxygen supply was cut off
D.
he wouldn’t answer the nurse’s questions
【单选题】He received a ________ wound soon after the battle began, and died two days later in a hospital.
A.
mortal
B.
moral
C.
curative
D.
slight
【单选题】He suffered a serious ( )in the car crash (猛撞), and died on the way to hospital.
A.
injury
B.
accident
C.
fall
D.
attack
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