皮皮学，免费搜题
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搜题
【单选题】
下列化合物不具有芳香性的是A.
苯
B.
环己二烯
C.
萘
D.
蒽
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
【多选题】下面关于地面观测值归算到高斯平面上叙述正确的是( )。
A.
地呵观测值的归算通常包括距离改正和方向改化
B.
地而观测值的归算通常包括高差改正和方向改化
C.
地面观测值的归算通常包括距离改正和倾斜改正
D.
方向改化是对水平方向观测值施加的改正
E.
方向改化是对垂直方向观测值施加的改正
【简答题】A．They have a private tutor. B．They go to a regular school. C．They attend a special school. D．They are taught by their parents.
【简答题】They are_________（意识到的）of the ers．
【简答题】Every place offers the possible ers for getting hurt, even staying at work. We may face ers like walking into desks or chairs, receiving unexpected cuts from a paper knife and so on. Industria...
【简答题】A．The ers of attacking each kind of wildlife. B．The ers of polluting the environment. C．The ers of starting a war. D．The ers of using too much nuclear power.
【单选题】What is mainly talked about in this news item?
A.
The dangers of smoking.
B.
The dangers of second-hand smoke.
C.
The dangers of third-hand smoke.
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