根据句意及首字母提示完成单词。
It's too hot, we need to drink more w____.
Mr. Black looks u____ , but he is a really good man.
—How is the salad? —Very d____.
—Where is the post office? —It's at the c____ of the street.
The movie Avatar is great. We d____to see it again.
2Z,达到平衡后，测得平衡时混合气体的总物质的量是开始时混合气体物质的量的0.7倍，则Y的转化率最接近于（ ）
