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【单选题】
多元酸能分步滴定的条件是()A.
Ka1/Ka2≥106
B.
Ka/K2≥105
C.
Ka1/Ka2≤106
D.
Ka/Ka2≤105
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【多选题】Suppose your brother is going to take an exam, what could you say to him?
A.
Best wishes for your exams.
B.
H ope you do well in your exams.
C.
Good luck with your exams etc.
D.
Sorry for your exams.
【单选题】It would be your duty to bear it, if you could not avoid it: it is weak and silly to say you cannot bear _______ it is your fate to be required to bear.
A.
that
B.
what
C.
when
D.
where
【多选题】If you need to know your schedule, you could say ( ).
A.
What’s my schedule for today?
B.
What’s my schedule like?
C.
Would you please send my schedule to my mailbox?
D.
Let me check my schedule.
【多选题】To welcome your audience in a presentation, you could say:
A.
Good morning to you all.
B.
Hello. Thank you for giving me this opportunity to ...
C.
Today I want t o talk to you about...
D.
That' all. Thank you for listening
【多选题】Suppose your brother is going to take an exam, what could you say to him?
A.
Best wishes for your exams.
B.
H ope you do well in your exams.
C.
Good luck with your exams.
【多选题】To welcome your audience in a presentation, you could say:
A.
Good morning to you all.
B.
Hello. Thank you for giving me this opportunity to ...
C.
Today I want to talk to you about...
【多选题】If you want to treat your friends after a meal, you could say "____________________" .
A.
It's my treat
B.
It's on me
C.
Let me treat you
D.
Let me pick up the bill
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