供电电源点确定的一般原则是什么？

假如小张和老赵某月的工薪收入分别为1900元、5000元，结合下表，下列选项中错误的是

个人所得税税率表（工资、薪金所得适用）

A、个人工薪收入所得税具有累进性质

B、征收个人所得税有利于促进社会公平

C、小张该月不用缴纳个人工薪收入所得税

D、老赵该月应缴纳450元的个人工薪收入所得税

Mary likes to invent things. She creates a new language and teaches it to her friend, Jean. Mary and Jean like to talk to each other in their own language because they think no one understands them and it is funny. When they go shopping, they say things like: “Look! He is fat.” “This CD is awful.” “I want to eat free hamburgers.” A clerk comes but he can’t understand what they say. He asked them: “May I help you?” Mary and Jean just laugh. What fun it is to create something new.

小题1:Which is Mary’s invention?

A．Teaching her friend.

B．A new language.

C．Go shopping.

D．Making hamburgers.小题2:Why does Mary like speaking her new language with her friend Jean?

A．Because they can talk but no one knows what they say.

B．Because it’s easy to speak new language.

C．Because her friend Jean likes it.

D．Because she wants free hamburgers.小题3:What do they do in the store?

A．They buy some things.

B．They talk with the clerk.

C．They want to understand what people say.

D．They use their new language and talk about people and things.小题4:The clerk may think that ________, so he comes to help them.

A．maybe they need help

B．they talk about him

C．they laugh at him

D．they invent things小题5:According to the passage, creating something new is _____.

A．boring

B．interesting

C．hard

D．easy

某一数字信号的传输速率为800Bd，若它采用八进制传输，则其传信率为（）。

A.400bit/s

B.2400bit/s

C.1600bit/s

D.6400bit/s

下列句子中加点的成语，使用不恰当的一句是______。

A．这事你现在做不了，就不要勉为其难，以后有条件再做不迟

B．他谦虚地说：“我既不擅长唱歌，也不喜欢运动；除了画画，就别无长物了。”

C．随着再就业工程的实施，许多下岗职工坚信山不转水转，自立自强，重新找到了人生的位置

D．在国企改革中，某些人“明修栈道，暗度陈仓”，打着企业改制的幌子，侵吞国有资产

机车采用轴向分裂、心式卧放、（）式安装的一体化多绕组变压器

A.竖式

B.下悬

C.开放