要使平衡氨含量尽量增大,应增大混合气体中惰性气体含量。
参考答案:错
—It’s a long time _______ I drunk so much.
—Yes, and what a pity it is since it will be a long time ______ we see each other again.
A before; since B. when; when
C. since; before D. when; then