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【判断题】
以太网使用的集线器(HUB)只是扮演了一个连接器的角色,不能放大或再生信号。A.
正确
B.
错误
拍照语音搜题，微信中搜索"皮皮学"使用
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皮皮学刷刷变学霸
举一反三
【单选题】She speaks more often than the rest of them and so she communicates _______________ with me than others.
A.
well
B.
best
C.
better
D.
good
【多选题】（多选）在湿空气比体积的单位中有个m3，还有个kg,（ ）
A.
m3是指绝干空气的体积
B.
m3是指湿空气的体积
C.
kg是指绝干空气的质量
D.
kg是湿空气的质量
【单选题】Why does Amina feel more confident when she speaks Chinese these days?
A.
Because she makes an effort to speak to Chinese friends in their language.
B.
Amina has a positive attitude towards learning languages.
C.
She can speak more fluently than before, and this makes her more confident.
【简答题】天然气的相对湿度是指单位体积天然气含水量与相同条件下(温度、压力)饱和状态空气_______的比值。
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