皮皮学，免费搜题
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【单选题】
在下列设备中，既可以作为输入设备，又可以作为输出设备的是（ ）。A.
扫描仪
B.
鼠标
C.
打印机
D.
触摸屏
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皮皮学刷刷变学霸
举一反三
【单选题】How much _____ the red sweater and how much _____ the pants? [ ]
A.
is；is
B.
is；are
C.
are；is
D.
are；are
【单选题】Which of the following is not an example of the opportunity cost of going to school?a.The money a student could have earned by working if he had not gone to college.b.The nap a student could have enj...
A.
a
B.
b
C.
c
D.
d
【单选题】He asked ______ for the violin. A.did I pay how much B.I paid how much C.how much did I pay D.how much I paid
A.
did I pay how much
B.
I paid how much
C.
how much did I pay
D.
how much I paid
【单选题】_____ beef do you need? [ ]
A.
How many
B.
How much
C.
How much kilos of
D.
How many kilos
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