皮皮学，免费搜题
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【简答题】
剖切面的种类根据物体的结构特点,可选择是单一剖切面、几个平行的剖切平面或几个相交的剖切面(交线______于某一投影面)。
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】—How do you go to school every day? —I ____ , but I ____ by bike a year ago.
A.
go to school by foot; went
B.
would go to school on foot; liked to go
C.
walk; used to go
D.
will walk to go school; was used to going
【单选题】— How do you go to the office every day? — I often go to the office _____ subway. Sometimes I _____ a taxi. [ ]
A.
by; take
B.
by; by
C.
take; by
D.
take; take