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问题 选择题

It's nearly time for class to start. The teacher _____ be here soon. [ ]

A. can

B. should

C. shall

D. need

答案

答案：B

选择题

I want to borrow a book ______ animals.                                    [ ]

A. with

B. in

C. of 

D. about

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选择题

下列热化学方程式书写正确的是[ ]

A．2SO2+O2=2SO3 ; △H= －196.6kJ/mol  

B．2H2(g)+O2(g)=2H2O(l) ; △H=－571.6kJ/mol

C．H2(g)+ 1/2O2(g)=H2O(l) ;  △H=－285.8kJ   

D．C(s)+O2(g)=CO2(g)  ;   △H=+393.5kJ/mol

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