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【单选题】
运输包装与销售包装不同的是,侧便于A.
促进销售
B.
美化商品
C.
便于运输与装卸
D.
宣传商品
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
【简答题】Teaching students of threshold level is hard work but the effort is very ________. A) precious B) rewarding C) worth D) challenging
【单选题】The students in China often get to school _____ bike, but the students in Japan usually _____ the train to school.
A.
on ; get
B.
by ; take
C.
in ; with
D.
ride; in
【简答题】According to the passage, why are students of the same achievement level grouped together?
【简答题】Grouping of students within the classroom at the elementary level often helps make ______ for the students.
【简答题】对普通蜗杆传动，主要应当计算主平面内的（）。
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