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【单选题】
高频RFID的频率范围是( )。A.
30~300kHz
B.
3~30MHz
C.
300MHz~3GHz
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反馈参考答案：
举一反三
【简答题】NCE课文背诵 （1分*10，满分10分） (L35)… As the thieves were trying to get away in their car, Roy drove his bus into the back of it. While 小题1:__________________________, Roy stopped his bus and telephoned the po...
【多选题】新古典综合派主要由( )综合而成。
A.
1890年马歇尔的《经济学原理》
B.
1933年张伯伦和罗宾逊的不完全竞争理论
C.
1939年希克斯的价值论和一般均衡论
D.
1936年凯恩斯的《就业、利息和货币通论》
【简答题】已知a为实数，化简： -a ，阅读下面李华的解答过程，请判断是否正确？若不正确，请写出正确的解答过程： 李华的解答过程： -a =a -a · =（a-1） 。
【单选题】To their surprise, the thieves were ( ) by the police while they were entering the bank.
A.
spotted
B.
beat
C.
detailed
D.
released
【简答题】To their disappointment, the thieves were ____ by the police at the moment they were entering the bank.
【单选题】To their disappointment, the thieves were ________ by the police at the moment they were entering the bank.
A.
clicked
B.
spotted
C.
intrigued
D.
maintained
【简答题】阅读下面一题及解答过程，请判断是否正确？若不正确，请指出错在哪一步？并写出正确的解答过程． 化简： a+ ab ab +b + ab -b a- ab a+ ab ab +b + ab -b a- ab = ( a ) 2 + ab ab + ( b ) 2 + ab - ( b ) 2 ( a ) 2 - ab a ( a - b ) b ( a - b ) + b ( a - b ) a ( ...
【单选题】To their disappointment, the thieves were __________ by the police at the moment they were entering the bank.
A.
discovered
B.
distinguished
C.
told
D.
spotted
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