基本分析流派的投资目标是按照投资风险水平选择投资对象。（）
参考答案：错
Would you like ________ the stadium for a match?
[ ]
A. to go
B. go
C. going
D. to go to
下列反应中，属于取代反应的是（ ）
①CH3CH=CH2+Br2CH3CHBrCH2Br
②CH3CH2OH CH2=CH2↑+H2O
③CH3COOH+CH3CH2OH CH3COOCH2CH3+H2O
④C6H6+HNO 3 C6H5NO2+H2O
A．①②
B．③④
C．①③
D．②④
CH3CHBrCH2Br
CH2=CH2↑+H2O