— I'm dead tired．I can't walk any farther, Jenny.
— _______, Tommy．You can do it! （ ）
A：No problem
B：No hurry
C：Come on
D：That's OK
给下列句子排出正确的顺序。
A. I see. My father is a postman, too.
B. Is your brother a postman?
C. Really? Where does your father work?
D. Yes, he is. He works in the post office near our school.
E. He works in the same post office with your brother.
____ ____ ____ ____ ____
“不敢高声语，恐惊天上人”．这里的“高”指的是声音的____ 大．月宫里的嫦娥不会听到你说话的声音，因为____ 不能传声。
反应后下列溶液的质量变小的是（ ）
