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【简答题】
客人到店的工作有哪些?
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举一反三
【判断题】放大电路只要能放大信号功率就可以称其有放大作用。
A.
正确
B.
错误
【简答题】用能斯特方程计算电对H 3 AsO 4 /H 3 AsO 3 在PH=0,2,4,6,8,9时的电极电势。用计算的结果绘制pH - 电势图,并用该图判断反应H 3 AsO 4 +2I - +2H + ⇋H 3 AsO 3 +I 2 +H 2 O在不同酸度下的反应方向。
【简答题】已知 φ Θ (H 3 AsO 4 /H 3 AsO 3 ) = 0.559 V , φ Θ (I 2 / I - ) = 0.535 V 。试计算反应 H 3 AsO 3 + I 2 + H 2 O = H 3 AsO 4 + 2I - + 2H + 在 298 K 时的平衡常数。
【单选题】听力原文:Ken :Hello, Rob. Rob :Hello, Ken... Hello Barbara. Come in. Shall I take your coats? Ken :Thank you very much. What a lovely house! Rob :I'm glad you like it. Ken :Where' s Anna? Rob :Oh, she's i...
A.
Ken and Barbara are eating out tonight.
B.
Rob and Anna are entertaining their friends at home.
C.
Anna is cooking a big meal for a family party.
D.
Old friends are gathering in Rob' s home to celebrate his birthday.
【判断题】3 Rob would take a pen and paper to write a book.
A.
正确
B.
错误
【多选题】给水管道系统按其服务对象的不同可分为( )系统。
A.
生活给水
B.
生产给水
C.
城市给水
D.
消防给水
E.
临时给水
【判断题】放大电路只要能放大信号功率就可以称其为其有放大作用( )
A.
正确
B.
错误
【单选题】Mr. Rob is still having difficulties_____ the computer started and would like to send one of your technicians to his house to fix it.
A.
get
B.
to get
C.
getting
D.
gotten
【单选题】The train arrives in Liverpool at 10 p.m. tonight . The plane I would like to take from there _______ by then.
A.
will leave
B.
would have left
C.
will have left
D.
has left
【单选题】According to the passage, how many couples broke up within a year?
A.
21% of couples
B.
3% of couples
C.
15% of couples
D.
12% of couples
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