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【判断题】
内因是事物发展的重要条件,外因是事物发展的根本原因,外因通过内因起作用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】When you're _t_________ ,you should have some water．
【单选题】W.H.R stands for _____.
A.
Water Head Register
B.
Water Heater Re-circulating
C.
Waste Heat Recovery
D.
Waste Handle Reference
【单选题】The Yellow River Conservancy Commission of the Ministry of Water Resources is headquartered in _____.
A.
Beijing
B.
Xi’an
C.
Xining
D.
Zhengzhou
【单选题】You can help your body by drinking water when you're thirsty _____ drinking extra water when it's warm out. [ ]
A.
but
B.
while
C.
or
D.
and
【简答题】非空二叉树中第i层最多有( )个结点。
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