纳米是一种长度单位,1纳米=10-9米,已知某种植物花粉的直径约为35000纳米

题型:选择题

问题:

纳米是一种长度单位,1纳米=10-9米,已知某种植物花粉的直径约为35000纳米,那么科学记数法表示该种花粉的直径为[ ]

A.3.5×10-4

B.3.5×10-4

C.3.5×10-5

D.3.5×10-9

考点:科学记数法和有效数字
题型:选择题

下面方框内是某班级在历史剧表演中的一段君臣对话。方框内的“君”与“臣”分别指的是

[ ]

A.秦孝公与商鞅

B.秦始皇与李斯

C.汉武帝与张骞

D.曹操与司马懿

题型:选择题

NaCl是一种化工原料,可以制备一系列物质(反应条件、部分反应物质已略去),它们的转化关系如图所示,请回答下列问题:

(1)工业上常用电解熔融NaCl的方法制取金属钠,NaCl熔化时破坏离子键的过程属于______(填“物理变化”或“化学变化”).

(2)写出工业上制取HCl的化学方程式______.

(3)写出工业上制取烧碱的离子方程式______.

(4)氨碱法制纯碱的工艺流程为:

由NaHCO3制取Na2CO3的化学方程式______.工艺流程中无向饱和食盐水中通入NH3(再通入CO2)的目的是:______.

(5)请你设计一实验证明Na2CO3溶液碱性比NaHCO3溶液的碱性强:______.

题型:选择题

. You shouldn’t only trust him. You’d better     the truth of the whole thing for yourself.      

A.search

B.look at

C.find out

D.search for

题型:选择题

第二节读写任务

阅读下面的短文,然后按要求写一篇150词左右的英语短文。

On a cold November afternoon, my mother and I were walking home from a pizza store. I was feeling a little tired as I was carrying our shopping bags of snacks. They were so heavy that I decided to throw away some things. So I started to walk to the garbage can while I noticed that a poor man was holding a paper bag with his dirty hand. He headed over to another nearby garbage can and started looking for something.

I suddenly felt very guilty because I was going to throw away a new drink just because it was heavy. I walked up to him and handed the drink and some snacks over to him. The man looked up in surprise and took what I gave him.

With a big smile on his face he said, “Wow! You are the first person to give me some sandwiches and drink, and some tasty food. This is my son’s lucky day.”

With that, he thanked me happily. There was a warm feeling inside me and I knew I had done something good. I now understand what the real meaning of “Giving is getting” is.

[写作内容]

以约30词概括短文内容;

以约120词就“Giving is Getting”这个主题发表看法并包括以下内容:

如今很多人仅关心自己而少关注别人;

你对“Giving is Getting”的理解;

用具体事例说明加以说明

【写作要求】

作文中可以使用自己的亲身经历或虚构的故事,也可以参照阅读材料的内容,但不得直接原文抄袭。

题型:选择题

在选中的复选框中有一个()符号?

A.V

B.X

C.△

D.●

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