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【单选题】
关于频分复用，下列说法中错误的是______。A.
频分复用的所有用户在同样的时间占用不同的带宽(是指频带宽)资源
B.
频分复用的所有用户在不同的时间占用同样的频带宽度
C.
在使用频分复用时，若每一个用户的带宽不变，则当复用的用户数增加时，复用后的信道的总带宽就跟着变宽
D.
在进行频率分复用时，复用器和分用器总是成对使用
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反馈参考答案：
举一反三
【多选题】随着小儿脑和颅骨发育而骨缝闭合,下列哪些是正确的
A.
正常健康儿前囟门在出生后1岁至1岁半闭合
B.
后囟门在出生后6~8个月闭合
C.
前囟迟闭见于佝偻病,脑积水,克汀病
D.
前囟饱满见于颅内压增加
E.
囟门凹陷见于严重脱水及营养不良
【单选题】听力原文： When my husband was promoted, we put our house up for sale. Three weeks later, it was still on the market. I became a busy housekeeper. Every room had to be kept tidy and dishes had to be washed...
A.
She wanted to move to New York.
B.
Her husband had lost his job.
C.
Her husband had got a higher position.
D.
She wanted to have a wider house.
【简答题】就世界范围而言全世界的第三方物流市场具有（ ）的特征。
【简答题】现代物流的特征有() A.物流反应快速化 B.物流功能集成化 C.物流服务系列化 D.物流作业规范化 E.物流目标系统化
【单选题】听力原文： When my husband was promoted, we put our house up for sale. Three weeks later, it was still in the market. I became a busy housekeeper. Every room had to be kept tidy, and dishes had to be washe...
A.
She wanted to move to New York.
B.
Her husband had lost his job.
C.
She wanted to have a cleaner house.
D.
Her husband had got a higher position.
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