问题 选择题

常温下,氨气为无色有刺激性恶臭气味的气体,密度比空气小,易溶于水.氨气溶于水显弱碱性,实验室可用氯化铵固体和氢氧化钙固体混合加热制取。则下列说法正确的是[ ]

A.可用向下排空气法收集到氨气  

B.氨水能使紫色石蕊试液变红色  

C.多余的氨气可排放到大气中  

D.实验室制氨气的发生装置与双氧水制氧气相同

答案

答案:A

单项选择题

About a week ago, when I was playing basketball at our local park, I noticed a small group of boys picking on a smaller, skinnier boy. They were (21) him names and even pushed him to the ground and kicked dirt in his face. (22) I saw that, I walked over to the group.
I stepped (23) them and the smaller boy, and asked them politely what this boy had done worthy of (24) they were doing to him. One of the boys replied, "He’s weird. " At that, I asked one of the boys if he thought his friend was weird, and the (25) was "No." So, I asked another boy what the word "weird" (26) , and he said, "Different." That was my cue (暗示). I told them that everyone is (27) , and that they all looked just as different to the other boy as he did to them. They all stood (28) for a moment, and then the most amazing thing happened. One of the boys helped the small boy off the ground and then said sorry to him. He (29) to let him play with them.
I thanked the boy for being so (30) As I looked around, I realized that there were dozens of other people at the park (31) no one else had stopped to help this boy. I felt happy that the boy was p enough to stand up against his friends to (32) someone in need, but I felt sad that (33) else had even taken a second look.
I hope that my action helped them (34) that they could have made a difference with a little (35) , and maybe next time they will be the ones who choose to help.

Ⅱ. 完形填空

/Close
通过下面短文,掌握其大意,然后再各题所给的四个选项(A、B、C和D)中选出一个最佳选项。

A.angrily

B.silently

C.carefully

D.happily

单项选择题