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【单选题】
盐析沉淀蛋白质的原理是( )
A.
中和电荷,破坏水化膜
B.
降低蛋白质溶液的介电常数
C.
使蛋白质溶液的pH值等于蛋白质等电点
D.
与蛋白质结合成不溶性蛋白盐
E.
调节蛋白质溶液的等电点
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参考答案:
举一反三
【单选题】当线程调用 start()后,其所处状态为( )
A.
A.阻塞状态
B.
   运行状态
C.
C、就绪状态
D.
D、新建状态
【单选题】当线程调用start( )后,其所处状态为( )。
A.
阻塞状态
B.
就绪状态
C.
运行状态
D.
新建状态
【多选题】以下不是利润表项目的有( )
A.
营业收入
B.
营业成本
C.
营业外收入
D.
税金及附加
【单选题】当线程调用start( )后,其所处状态为
A.
阻塞状态
B.
运行状态
C.
就绪状态
D.
新建状态
【简答题】This is Joy’s bedroom.it’s a small room . He has some pictures.They are on the wall. He also has a desk and a chair in his bedroom.The desk is near the window. His bag and pencil box are on the desk. ...
【单选题】A young husband has to work for his wife's family in some societies ______
A.
because he has to wait until he has three children
B.
because he has to make enough money for his wife' s family
C.
because it is a necessary ceremony at marriage
D.
because it is a necessary type of gift to exchange at marriage
【多选题】胸外按压心脏时,要掌握的要点包括
A.
双手叠加,掌根部放在胸骨中下1/3处垂直按压
B.
按压深度:成人为5~6cm
C.
按压频率:成人100-120次/min
D.
复苏者应在病人右侧
E.
按压/放松时间比为1:1
【单选题】您是否认同将分工明确到个人并依据其完成成果进行评分
A.
B.
【多选题】胸外按压心脏时,要掌握的要点包括
A.
双手叠加,掌根部放在胸骨中下 1/3 处垂直按压
B.
按压深度:成人为 4 ~ 5cm, 儿童为 3 ~ 4cm
C.
按压频率:成人 100/min
D.
复苏者应在病人右侧
E.
按压 / 放松时间比为 1 : 1
【单选题】Mr. Norman has raised some interesting points, but there's one thing he has completely failed to _____. [      ]
A.
block out
B.
account for
C.
stand for
D.
come up
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