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【单选题】
己知i为虚数单位，则 i 1+i =（ ）A.
1-i 2
B.
1+i 2
C.
-1-i 2
D.
-1+i 2
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举一反三
【简答题】_________________(希望) that everything will turn out all right.
【简答题】Whether you live to eat or eat to live, food is a major ________ in every family’s budget. A) nutrition B) expenditure C) routine D) provision
【单选题】----The radio is too noisy. __________, please. -----All right. I’ll do it
A.
Turn it off
B.
Turn it on
C.
Open it
D.
Close it
【单选题】Whether you live to eat or eat to live, food is a major ______ in every family's budget.
A.
nutrition
B.
expenditure
C.
routine
D.
provision
【多选题】假如某厂商处在垄断竞争的市场中,下列说法错误的是( )
A.
该厂商面对的需求曲线的弹性无限大
B.
该厂商生产的商品没有替代品
C.
该厂商的需求曲线向下倾斜
D.
该厂商的需求曲线向上倾斜
E.
该厂商没有有规则的短期供给曲线
【简答题】听录音，给下列句子标序号。 ( ) Turn right. ( ) Turn left. ( ) Walk backward. ( ) Turn around. ( ) Go straight. ( ) Go up the stairs. ( ) Walk forward. ( ) Go down the stairs.
【单选题】--Oh, the music is wonderful. Would you please _______ the radio? ---All right.
A.
turn on
B.
turn off
C.
turn up
D.
turn down
【单选题】Don't turn right. Turn _____________ please. [ ]
A.
go straight
B.
left
C.
outside
D.
in front of
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