（）的变态根中主要食用部分是次生木质部。 A.胡萝卜 B.萝卜 C.甜菜 D.甘薯

A new library opens in the town. It's a very big library. Some robots work there as library assistants. The robots can help you find the right books you want and do other things you tell them to. But you must say “Please”when you ask for something and “Thank you”when you get something.

Li Ming wants to borrow a book from the new library. He comes to the library with Zhang Hua. They see a robot standing there.

Li：Hey，give me the book “Little Tom”．Why，the robot doesn't work. There must be something wrong with it.

Zhang：No，there isn't. When you borrow a book，you must say “Please”．

Li：Will you please give me the book“Little Tom”，Mr. Robot?

Zhang：Look！The robot is bringing you the book. Take it，Li Ming.

Li：What's wrong with the robot？It won't let me have the book.

Zhang：Yor must say “Thank you”．

Li：Oh，thank you very much，Mr. Robot.

The robot smiles and gives the book to Li Ming.

阅读短文，判断正T误F。

小题1:In the library all the assistants are robots.

小题2:The robot will be glad to help you if you say

“Please”and “Thank you”.

小题3:Li Ming asks for help from the robot in the library.

小题4:Mr. Robot is a young man.

小题5:People say “Please”and “Thank you”only to robots.

一列波的波速为0.5m/s，某时刻的波形图如图所示，经过一段时间（小于一个周期）后波形如细线所示，这段时间可能是______s或______s．

阅读下面文言文，回答问题

子贡曰：“贫而无谄，富而无骄，何如?”子曰：“可也。未若贫而乐，富而好礼者也。”子贡曰：“《诗》云，‘如切如磋!如琢如磨’，其斯之谓与?”子曰：“赐也!始可与言《诗》已矣，告诸往而知来者。”

注 ①如切如磋，如琢如磨：此二句见《诗经．卫风，淇澳》。有两种解释：一说切磋琢磨分别指对骨、象牙、玉、石四种不同材料的加工，否则不能成器；一说加工象牙和骨，切了还要磋，加工玉石，琢了还要磨，有精益求精之意。

小题1:翻译上面选段中画线的句子。

(1)贫而无谄，富而无骄，何如?

(2)赐也!始可与言《诗》已矣，告诸往而知来者。

小题2:子贡引用“如切如磋，如琢如磨”是为了说明什么道理?为什么孔子认为可以同子贡谈论《诗》?

库仑滴定法中，主要测量的参数是（）

A.电解电流

B.电动势

C.电解时间

D.指示电极电位

在实际销售过程中80%的异议都应该用（）解决。

A冷处理法

B转化处理法

C以优补劣法

D转折处理法