皮皮学，免费搜题
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搜题
【多选题】
疲劳磨损、点蚀、剥离的齿轮失效形式是由。A.
齿轮材料选择不当
B.
供油中断，产生严重的过热现象
C.
齿轮过载或负荷分布不均匀
D.
齿轮硬度不够
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】. As the newspaper reported, the talks were held in an open, friendly, cooperative and constructive ______.
A.
environment
B.
atmosphere
C.
condition
D.
situation
【单选题】—Excuse me, _____ can I get to the nearest bookshop? —Go along this road and you will find it on your right. [ ]
A.
why
B.
where
C.
when
D.
how
【单选题】Go along the street ______ you reach (到达，伸出) the end of the road.
A.
if
B.
when
C.
until
【简答题】The teacher designs group activities that encourage constructive interaction.
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