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【单选题】
下面哪一项是亚里士多德提出哲学产生的两个原因?()A.
惊异；闲暇
B.
惊异；论辩
C.
闲暇；论辩
D.
知识；态度
拍照语音搜题，微信中搜索"皮皮学"使用
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【简答题】阅读理解 It may sound strange, but cutting down a real tree for Christmas is actually greener than going with the artificial kind, one scientist says. 'It is a little confusing to people,' said Clint Spri...
【简答题】The passage is mainly about ______on cutting down on it.
【简答题】A．Conducting surgery on the tree. B．Catching a fruit bat up a tree. C．Cutting trees on an island. D．Climbing a skyscr.
【单选题】下列关于运算符重载的描述中,错误的是
A.
可以通过运算符重载在 C++ 中创建新的运算符
B.
赋值运算符只能重载为成员函数
C.
运算符函数重载为类的成员函数时，第一操作数是该类对象
D.
重载类型转换运算符时不需要声明返回类型
【简答题】A.Cutting down a dead tree. B.Planting new trees on campus. C.Identifying unusual trees. D.Landscaping their yard.
【单选题】It's our duty to _____ people _____ too many tree. [ ]
A.
stop; cutting down
B.
prevent; to cut
C.
keep; cutting down
D.
make; cut down
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