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【单选题】
下列关于光纤传输技术的说法中,不正确的是( )。A.
光纤是传输性能最好、应用前途广的有线传输介质
B.
利用光纤传输数字信号需要进行调制,光载波调制采用相位调制方式
C.
光信号在光纤内部的传输基于光的全反射实现
D.
光纤分为与多模两种类型
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举一反三
【单选题】---He hasn’t tried Amazon Buffet before, has he? ---______. He hopes to have a chance to eat there.
A.
No, he has
B.
No, he hasn’t
C.
Yes, he has
D.
Yes, he hasn’t
【单选题】Jack didn't pass the driving test, but he still ________. [ ]
A.
hopes to
B.
hopes so
C.
hopes that
D.
hoped
【单选题】He hopes he can visit the United Nations building while he ______ in New York next summer.
A.
has been
B.
is
C.
will be
D.
shall be
【单选题】以下关于合同性质的说法中不正确的是 ( ) 。
A.
合同是一种合意关系
B.
合同是一种事实行为
C.
合同是设立变更终止民事权利义务关系的协议
D.
合同是一种民事行为
【单选题】He has entertained hopes of being admitted to a sight of the wonderful valley , of ____ beauty he has heard .
A.
which
B.
of whose
C.
whose
D.
form which
【简答题】书面表达。 根据图片，用所学过的单词描述一下这个女孩。 _______________________________________________________________________________ _______________________________________________________________________________ ____________...
【简答题】将下列宾语从句改写成简单句。 1. He hopes that he will be back very soon. He hopes _______ _______ back very soon. 2. Could you tell me how I can get to the post office? Could you tell me ________ ________ to the po...
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