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【单选题】
在OSI参考模型中,物理层存在四个特性。其中有关标准连接器插针的数量的内容属于()。A.
过程特性
B.
电气特性
C.
功能特性
D.
机械特性
拍照语音搜题，微信中搜索"皮皮学"使用
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】Why does Mike looks annoyed?
A.
He doesn't like Paula.
B.
He thinks the bench is too crowded.
C.
It's too noisy in the courtyard.
D.
Mike doesn't want to share the bench with others.
【单选题】Why didn't they see Castaway?
A.
Mike knows the film is stupid.
B.
Mike didn't like the book.
C.
Jane had seen it once.
【单选题】剪力单位是()、弯矩的单位是()。
A.
N或kN，N或kN
B.
N-m或kN．m，N．m或kN．m
C.
N或kN，N．m或kN．m
D.
N-m或kN．m，N或kN
【单选题】—What did the teacher say to you just now? —She asked ______ yesterday. [ ]
A.
why was Mike not here
B.
why is Mike not here
C.
why Mike was not here
D.
why Mike is not here
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