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【单选题】
数字 通信系统的 可靠 性用( )来度量。A.
传输频带
B.
差错率
C.
传输速率
D.
频带利用率
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举一反三
【多选题】Which of the following food is typical on Winter Solstice?
A.
Dumplings
B.
Red bean rice
C.
Noodles
D.
Tangyuan
【多选题】Which of the followings are the traditional activities on Winter Solstice in Southern China?
A.
Making winter solstice rice ball
B.
Drying winter rice
C.
Playing "Dagang" game
D.
Making antithetical couplets
【单选题】There is a saying in Shandong province which goes, “eat ______ on Winter Solstice and eat ______ on Summer Solstice.”
A.
noodles, tangyuan
B.
noodles, jiaoz
C.
tangyuan, noodles
D.
jiaozi, noodles
【简答题】电子支付的概念,简述其类型?
【单选题】--You've done this before, right?--No, but if we follow the directions, we ______ have any trouble.
A.
needn't
B.
mustn't
C.
shouldn't
D.
couldn't
【简答题】We were told that we should follow the main road______we reached the central rail- way station. [A] whenever [B] until [C] while [D] wherever
【简答题】数控程序中圆弧圆心角 ≤180°半径的数值为___,圆弧圆心角>180°半径的数值为___,整圆只能用I、J、K方式。
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