知道死亡是生命的终结、并且惧怕死亡及死亡前痛苦的年龄是()
A．1岁以后
B．5岁以后
C．8岁以后
D．10岁以后
E．15岁以后
参考答案：D
I don’t think it’s sensible of you to ______ your greater knowledge in front of the chairwoman, for it may well offend her.
A. show up B. show off C. show out D. show away
论述阀门检查的必要性？
