皮皮学，免费搜题
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搜题
【多选题】
娱乐体育的特点A.
主体性
B.
内容多样性
C.
自由性
D.
创新性与 自然性
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
【单选题】Printing is known as “mother of civilisation”. It has a long history and includes block printing and _________ printing.
A.
movable type
B.
color printing
【简答题】A Release B Publication C Printing D Exposure
【单选题】How to construct objects during 3D printing?
A.
by combining solid parts together
B.
by printing layer by layer
C.
by printing large amount of paper
D.
by spitting out liquid material which solidifies later