一艘轮船自重4×10⁷N，最大载货量是1.5×10⁸N，则这艘轮船的最大排水量是　____ t，如果船在港口将货物卸下6×10⁷N，则轮船所受浮力是____ N，它的排水体积减少____ ．（设船在内河航行，取g=10 N/kg）

口语运用
A: Hi, Tom.
B: Hi, Mary.
A:____ 
B: I’m doing my homework.
A: Do you want to come to my house after school? ____ 
B: That sounds great! ____ 
A: It’s on Long Street. It's a quiet street.
B:____  There is a school on it.
A: Yes, and my house is across from it.____ 
B: OK! I'm sure to see you.
选项：

E.  I know the street.

化学是一门以实验为基础的科学，某校化学兴趣小组用如图装置完成实验，请根据要求回答：