问题
选择题
The program “ Master’s Lectures” of CCTV are both interesting and instructive .No wonder they_______a large audience.
A．appoint to
B．account for
C．appeal to
D．appear on
答案
答案：C
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The program “ Master’s Lectures” of CCTV are both interesting and instructive .No wonder they_______a large audience.
A．appoint to
B．account for
C．appeal to
D．appear on
答案：C
4NO(g)+6H2O(g) △H= -905kJ/mol ① 
2NO(g) △H =+181. 5kJ/mol