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【判断题】
Yin and Yang are opposite therefore not interchangeable.A.
正确
B.
错误
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皮皮学刷刷变学霸
举一反三
【简答题】match each sentence with the corresponding picture.
【简答题】Match each term with its corresponding picture
【简答题】教育心理学作为一门独立的学科诞生于（ ）年。
【判断题】When cutting brittle metal, cutting heat mainly comes from deformation heat in shearing region.
A.
正确
B.
错误
【单选题】The cutting tool removes metal ______it travels past the revolving workpieces.
A.
for
B.
as
C.
so
D.
if
【简答题】Match each statement with the cortesponding picture.
【单选题】The cutting tool removes metal ______it passes through the rotating workpiece.
A.
before
B.
as
C.
since
D.
after