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【多选题】
克服电波衰落的一般方法有（ ）。A.
利用地形地物削弱反射波的影响
B.
将反射点设在反射系数较大的地面
C.
利用天线的方向性
D.
用无源反射板克服绕射衰落
E.
分集接收
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皮皮学刷刷变学霸
举一反三
【单选题】(非谓语动词,时态)They rushed to the station only to find the train ______ already.
A.
was left
B.
had left
C.
is leaving
D.
has left
【单选题】Which of the following statements is true about a traditional social networking website?
A.
A traditional social networking website groups specific individuals or organizations together.
B.
A traditional social networking website posts the personal information of its members.
C.
A traditional social networking website provides its members with privileges such as downloading music.
D.
A traditional social networking website has no main focus, so anyone can become a member.
【简答题】党在民主革命时期,逐步认识到土地革命的极端重要性,形成了土地革命路线,这就是依靠贫雇农,团结中农,有步骤、有分别地消灭____,发展农业生产。
【单选题】不能治愈的性传播疾病是:
A.
由衣原体,螺旋体,原生动物感染引起的性传播疾病
B.
由寄生虫,昆虫感染引起的性传播疾病
C.
由细菌感染引起的性传播疾病
D.
由病毒感染引起的性传播疾病
【单选题】党在民主革命时期,逐步认识到土地革命的极端重要性,形成了土地革命路线,这就是依靠贫雇农,团结中农,有步骤、有分别地消灭( ),发展农业生产。
A.
地主
B.
富农
C.
封建剥削制度
D.
手工业者
【单选题】Based on the video clip, what can be a sign of a social networking addiction?
A.
You prefer playing online s to hanging out with your friends.
B.
You prefer quantifying your social life through social networking.
C.
You can't function in your daily life well without social networking.
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