下列哪项不属于生产和工艺流程中产生的有害因素（） A.一氧化碳 B.噪声 C.矽尘

下列技术成就与化学无关的是（　　）

A．瓷器的烧制

B．研究吸收贮存氢气的新材料

C．用高能燃料推进火箭

D．指南针的发明

考任制，就是政府为推行公务，采用公开竞争考试的科学方法，来测量并判断其所需要的人员是否合乎标准，进而按考试成绩的优劣进行挑选，取其优者来加以任用为政府工作人员的一套制度。下列任用方式属于考任制的一项是( )。

A．秦始皇设立郡县制度，所有官吏必须由他一人任免

B．由于兰考的条件差，省委决定调焦裕禄同志去担任县委书记

C．小张参加北京市政府组织的公务员资格考试，被录用在市卫生局

D．弗罗姆来中国担任销售总监

If you've been joining in chat room conversations, or trading e-mail with Web pals, you have become one of the millions who write in a peculiarly short form of English.

And you've got a sense of humor about short forms like SOHF(="sense" of humor failure) to describe Internet newcomers who don't understand you.

Across the globe, every night teenagers and their elders are “talking” online—many of them are talking at the same time.

It's fast: try talking to six people at once. It's brief: three or four words per exchange. It takes wit, concentration, and quick fingers.

And it requires tremendous linguistic economy. There's neither time nor space for explanations. Why consume precious key-strokes telling six friends you have to leave for a moment to take care of your little brother when BRB(="be" right back) will do? Want to enter a conversation? Just type PMFJI(="pardon" me for jumping in).  Interested in whom you're talking to? Type A/S/L, the nearly universal request to know your pal's age, sex and location. You may get 15/M/NY as a response from your pal.

If something makes you laugh, say you're OTF(="on" the floor),or LOL(="laughing" out loud),or combine the two into ROTFL(="rolling" on the floor laughing).

And when it's time to get back to work or go to bed, you type GTG(="got" to go) or TTYL(talk to you later).

People want to write as fast as possible, and they want to get their ideas across as quickly as they can. Capital letters are left in the dust, except when expressing emotion, as it takes more time to hold down the “shift” key and capitals. Punctuation is going, too.

小题1:In order to talk to several people at the same time on the Internet_______.

A．you have to speak fast and fluently

B．you have to express your ideas in a brief way

C．you should speak with wit and humor

D．one should pay much attention to the accuracy of the words小题2:If you get 17/F/NY as an answer to your A/S/L, it means_______.

A．the person on the other end is 17 from New York and he is fine

B．you are talking to a girl who is 17 and lives in New York

C．you are talking to 17 girls who are from New York

D．the person who are talking to you is a 1.7-foot tall New York girl小题3:To save time on the Internet_______.

A．some people leave their letters in the dustbin

B．some people never use “shift” in their writing

C．many people leave the capital and punctuation

D．people seldom use capital letters or punctuation

I5T1.4车床一共使用（）根丝杠零件。

A.1

B.2

C.3

修整旧蜗杆时，齿厚尺寸没有严格要求，但（）和（）必须满足要求。