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【单选题】
Mary showed the (customs) officer her passport, (then) John showed (him) (his one).A.
customs
B.
then
C.
him
D.
his one
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反馈参考答案：
举一反三
【单选题】残留边带调制 VSB 的频谱宽度为 。
A.
与标准调幅 AM 的相同。
B.
大于 DSB信号带宽 。
C.
大于 SSB信号带宽，小于DSB信号带宽。
D.
小于 SSB信号带宽。
【单选题】He made efforts to be the top student in the class.
A.
mortal
B.
feeble
C.
ceasing
D.
unceasing
【单选题】“Why isn’t John in class?”“He be sick, or he’d have been here already.”()
A.
should
B.
may
C.
must
D.
would
【单选题】He made efforts to be the top student in the class.
A.
ceasing
B.
feeble
C.
unceasing
D.
mortal
【简答题】He ___ (be) in Class 4, Grade 3.
【单选题】残留边带调制VSB的频谱宽度为 ( )。
A.
小于SSB信号带宽。
B.
大于SSB信号带宽，小于DSB信号带宽。
C.
大于DSB信号带宽
D.
与标准调幅BAM的相同。
相关题目：
【单选题】He made efforts to be the top student in the class.
A.
mortal
B.
feeble
C.
ceasing
D.
unceasing
参考解析：
知识点：
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