鉴定润滑油变质和老化的方法有两种取样化验分析法和()鉴定法。A、沉降法 B、隔离法

题型:单项选择题

问题:

鉴定润滑油变质和老化的方法有两种取样化验分析法和()鉴定法。

A、沉降法

B、隔离法

C、显微镜

D、人眼感观

考点:集输工考试集输中级工考试集输中级工考试题库
题型:单项选择题

“精密称定”系指( )

A.称取重量应准确至所称重量的百分之一
B.称取重量应准确至所称重量的千分之一
C.系指称取重量应准确至所称重量的万分之一
D.量取体积的准确度应符合国家标准中对该体积移液管的精度要求
E.可用量筒或按照量取体积的有效位数选用量具

题型:单项选择题

桃核粉()

题型:单项选择题

Everyone is at it, even my neighbors. I thought I might be the only person left in the world who hadn’t done an eBay deal. So, I decided to try my hand at online auction (网上拍卖).

Buying for beginners: Sign up on www. ebay. co. uk. Most items(e.g. tables, computers, and books)ready for auction will come with a picture and a short description; others may be marked with “ Buy It Now ” and have a fixed price. You can buy these right away.

If the item is being auctioned, you offer the highest price you are prepared to pay and eBay bids(出价)for you. The bid will be increased little by little until it goes beyond your highest bid, then you are emailed and asked if you would like to bid again. Auctions last up to 10 days and when they finish you get an email telling you whether you have won the item.

How to pay: Sellers decide how they would like to be paid and you need to check this before placing a bid as you might not want to post a check or postal orders. The easiest way is through PayPal, an online payment system that takes the money away from your credit card (信用卡).

Selling made simple: If you plan to sell on eBay, it helps to include a picture of the item. I followed my friends’ advice and put up the items I wanted to sell for a 10-day auction, starting on a Thursday. This way buyers had two weekends to bid.

The big things in life: It’s easy to post a small item, but furniture is a big part of eBay and this has to be collected or sent by delivery men. Check the ways of delivery before you bid.

小题1:What is the passage mainly about?

A.How to make payment online.

B.Ways of using delivery online.

C.Advantages of an online-auction system.

D.How to use an online-auction system.小题2:After bidding for an item, a buyer __________.

A.will get what he wants in ten days

B.should make payment immediately

C.has chances to make higher bids

D.may check its picture and description小题3:The easiest way of making payment mentioned in the passage is __________.

A.through an online payment system

B.through a local banking system

C.by sending the money to the seller

D.by paying the deliveryman directly

题型:单项选择题

内燃机主要技术性能,判断方法有,起动性能,空车运转两种

题型:单项选择题

汽枪弹击碎玻璃的痕迹与其他膜线的枪支击碎玻璃的痕迹是不一样的。这是因为汽枪虽然有膛线,但它是用弹簧压缩空气作为动力来发射弹头,速度低、能量小、重量轻(每个汽枪枪弹重0.5克),所以汽枪撞击玻璃时,对玻璃的作用时间长,作用力小,穿透能力小,其玻璃击碎痕迹也不同于石击玻璃的痕迹。
最能准确复述这段话主要意思的是( )。

A.汽枪击碎玻璃的痕迹不同于其他枪支痕迹

B.汽枪弹击碎玻璃的痕迹之所以不同于其他枪支造成的痕迹是由于它是用弹簧压缩空气作为动力的

C.汽枪撞击玻璃时,对玻璃的作用时间长

D.其他有膛线的枪支的弹痕也不同于石击玻璃的痕迹

更多题库