一人在平面镜前照镜子时,距离平面镜2m,他在平面镜中的像距平面镜______m;

题型:填空题

问题:

一人在平面镜前照镜子时,距离平面镜2m,他在平面镜中的像距平面镜______m;当他向平面镜移动时,他在镜中的像的大小______(填“变大”、“不变”或“变小”);若人是以1m/s的速度向平面镜靠近,则像相对于人的速度为______m/s.

考点:平面镜成像的特点和原因
题型:填空题

阅读理解。

    My problems started after I went to a boarding school (寄宿学校). I was only 14, and at first I missed

my family a lot. I often called them and cried on the phone. But after two weeks, I found I enjoyed being

with my classmates at school.

    I had many friends who were boys. I thought of them as my best friends - but only friends. I never

guessed my friendships with boys would become a problem. 

    Then, three months later, my friends told me that some teachers and girls said I was hanging out with

boys all day long in order to get attention from them. Seven months after that, the head teacher Mr. Wang

asked the class to choose some students to join the Student Union. I thought I could win for I was doing

well in school. I'd already won prizes for the best math and English exams. A week later, the list came out

and it didn't include me. I was sad.

    Mr. Wang came to me and said, "Don't be sad. I know you're excellent! Maybe you're a little distant

from the girls in our class. They don't know much about you, so some of them didn't choose you. It doesn't

matter. Do your best to get along well with everyone and I think you'll make it next time."

1. What was the writer's problem when she first entered the boarding school?[ ]

A) She didn't like her new school.

B) She didn't get along well with her classmates.

C) She missed her family very much.

2. Many of the writer's friends in her new school were ______. [ ]

A) teachers

B) boys

C) girls

3. Why did the writer fail to join the Student Union? [ ]

A) Her teachers didn't like her.

B) She was a poor student.

C) Some girls didn't choose her.

4. The underlined word "distant" means "______" in Chinese? [ ]

A) 疏远的

B) 挑衅的

C) 偏心的

5. Which of the following is NOT true, according to the passage? [ ]

A) The writer won prizes for the best science and English exams.

B) The writer didn't realize that her friendships with boys would cause problems.

C) The writer was sad because she failed to join the Student Union.

题型:填空题

在护理时措施不正确的是

A.禁食

B.限制液体的入量

C.胃肠减压

D.观察呕吐物的量、性质和气味

E.准确记录出入量

题型:填空题

吴某因憎恨自己所在学校的领导将自己开除,意欲夜晚潜入学校领导将其杀死,后来在情急之中误将张三当作校领导杀死,吴某该行为应属于( )。

A.行为性质错误

B.工具错误

C.行为对象错误

D.因果关系认识错误

题型:填空题

GB2760—1996规定;亚硫酸盐用于竹笋罐头时的最大残留量是以SO2计为()。

题型:填空题

填入下面横线处的句子,与上下文衔接最恰当的一项是( )。
没有天敌的动物往往最先灭绝,有天敌的动物则会逐步繁衍壮大。______。汤武因为有残暴的桀纣为敌而获得了拥护者,______,最后得到了天下。换个角度讲,真正使罗马帝国灭亡的正是因为没有了强大的对手,在东方的古老秦帝国,______,可以说也是同样的原因。
①人类社会也同样存在大自然中的这一悖论
②大自然中的这一悖论在人类社会也同样存在
③刘邦因为谨小慎微而打败项羽
④刘邦因为项羽而谨小慎微
⑤建立不久就迅速覆灭
⑥能够强盛统一天下

A.①④⑤
B.②④⑤
C.①③⑥
D.②③⑥

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