反应X(g)＋Y(g)2Z(g)；H＜0，达到平衡时，下列说法正确的是

A．减小容器体积，平衡向右移动

B．加入催化剂，Z的产率增大

C．增大c(X)，X的转化率增大

D．降低温度，Y的转化率增大

As she greeted me at the door, my prospective roommate seemed to be the happy and carefree friend I had dreamed before I came to the university.

A．eventual

B．would-be

C．probable

D．prosperous