题目

一氧化氮气体难溶于水，密度略大于空气。常温下易与空气中的氧气反应生成红棕色的二氧化氮，实验室收集一氧化氮，宜采用的方法是A．向上排空气法  B．排水法  C．向上排空气法或排水法   D．向下排空气法或排水法 答案：B 阅读理解 　　Mr．Brown wants to live near his workplace．Mrs．Brown wants a house with four bedrooms．The Browns’ children don't care what the house is like as long as the garden is big enough．Ann, their daughter has always wanted to work in a restaurant．She thinks it is an exciting place．It's hard work but she isn’t lazy．You have to work on Saturdays and Sundays, but you get other days off．It’s not very well paid．But who cares about money？ 　　Tom is a middle school student．He is twelve years old．He stops school at half past three, so he has plenty of time to finish his homework． 　　Jack, Mr．Brown's brother, is looking for a room to rent．He doesn't care what color the walls are or how old the furniture(家具)is．He is getting ready for his drawing．So the house must be quiet． (1) Why didn't the Browns buy the house in Advertisement One? [　　] A． It was on the north side of town． B． There weren’t enough bedrooms． C． There was no dining room． D． The garden was too big． (2) Why does Ann want to get the job in the restaurant? [　　] A． It’s an easy job． B． The place is good and the food is free． C． She thinks it will be interesting． D． She can get long holidays． (3) Why can't Tom play for the new football team? [　　] A． He's not old enough． B． It’s in a different village． C． School stops too late． D． He has to do his homework． (4) What's wrong with the room for Jack in Advertisement Four? [　　] A． It's too small． B． The walls are the wrong color． C． The man likes old furniture better． D． It's too noisy． (5) What does the sentence “All meals free” mean? [　　] A． Waiters can have the meals at any time． B． Waiters can have the meals in the restaurant without paying money． C． Customers can have the meals freely． D． Waiters need to pay for their meals．