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问题 选择题

已知反应Cu(s) + 2Ag+(aq) = Cu2+(aq) + 2Ag(s)为一自发进行的氧化还原反应，将其设计成如图所示原电池。下列说法中正确的是   

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A．电极X是正极，其电极反应为Cu－2e－ ＝ Cu2+

B．银电极质量逐渐减小，Y溶液中c(Ag+)增大

C．实验过程中取出盐桥，原电池仍继续工作

D．当X电极质量减少0.64 g时，外电路中有0.02 mol电子转移

答案

D

单项选择题

气管内插管即时并发症不包括（）

A.高血压和心律失常

B.气管导管误入食管

C.误吸

D.颅内压升高

E.喉痉挛
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问答题

To be, or not to be—that is the question;
Whether’ tis nobler in the mind to suffer
The slings and arrows of outrageous fortune,
Or to take arms against a sea of troubles,
And by opposing end them
Questions:
A. Who is the author of the play
B. Who is the speaker
C. What does he mean when he says "To be, or not to be—that is the question"
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