皮皮学，免费搜题
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【单选题】
如果要用cd命令切换到某目录下，需要用户对该目录具有（）权限A.
读
B.
写
C.
执行
D.
不需要任何权限
拍照语音搜题，微信中搜索"皮皮学"使用
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知识点：
皮皮学刷刷变学霸
举一反三
【单选题】He is known to be , because he always thinks of himself instead of others.
A.
helpful
B.
good-natured
C.
patient
D.
self-centred
【单选题】He doesn’t want it to be known he is going to quit his job.
A.
where
B.
that
C.
how
D.
which
【单选题】He is known to be , because he always thinks of himself instead of others. A. helpful B. good-natured C. patient D. self-centred
A.
helpful
B.
good-natured
C.
patient
D.
self-centred
【单选题】He is watching TV?He is_to be cleaning his room.
A.
known
B.
supposed
C.
regarded
D.
considered
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