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【单选题】
十进制数 91 转换成二进制数是( )。A.
10101101
B.
1011011
C.
1011101
D.
1001101
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【简答题】In America, when the eighth graders leave the middle school, they are often worried about moving to the high school. It is a hard time for them, but it can be an exciting one as well. To make it easie...
【简答题】In America, when the eighth graders leave the middle school, they are often worried about moving to the high school. It is a hard time for them，but it can be an exciting one as well. To make it easier...
【单选题】Pilots often look older than they really are because______.
A.
they eat dinner in the middle of the night
B.
they suffer a lot from the changes in time
C.
they have to work at the weekend
D.
they live far away from the airport
【单选题】-- Are these _______ all from No. 2 Middle School? -- Yes. They often _________ their free time to help the old here.
A.
volunteers; volunteers
B.
volunteer; volunteers
C.
volunteers; volunteer
D.
volunteer; volunteer
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