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单选题
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  • 等于
多选题

影响过滤速率的因素有哪些?

  • 压强差

  • 滤饼厚度

  • 悬浮液温度

  • 过滤介质阻力

单选题

已知,则( )成立.

单选题

是来自正态总体的样本,则检验假设采用统计量U =(  ).

单选题

— Have you ever shopped online?

— ______.

  • Yes,I do.

  • Quite often .It is very convenient,saving me a lot of time.

  • Certainly.

单选题

We must ______unnecessary expense.

  • abolish

  • cancel

  • eliminate

完形填空

二、阅读理解:阅读下面的短文,根据文章内容进行判断,正确为“T”,错误为“F”。

It is amazing to note that the Internet is still such a new deviceand yet it is one of the fastest and most powerful media tools. But think about it for a moment. On the Interneta big online company can be run by only two guys in their garage. So it is only reasonable thenthat people shopping online would be a little leery of the security levels.
Internet giants such as Microsoft knew consumer confidence was the key to getting virtual(虚拟的) shopping off the groundand they work hard to make people feel safe to shop online.
Credit card companiestooquickly saw the potential for online shoppingand have installed things like online shopping insurance for people. If you ever have a problem with your online credit purchasesmany credit card companies will happily refund(退还) your money and then set their claws on the company that wronged you. Now that’s buying power!
There are other bonuses for online shoppersof course. No line­upsfor one. No annoying mall shopping carts with broken wheels and kids crying because their parents won’t get them what they want.
When shopping onlineconsumers can sit downhave a coffeeand wear their slippersnot having to worry about their hair or parkingand just clicking through sale after sale. Comparison shopping couldn’t be any easier. And thanks to courier companies(快递公司) getting in on the actyou never need to wait longer than a day or two to get those all important purchases delivered right to your door.
No wonder so many companies are shaking their heads at traditional retailing and instead looking to the “virtual” world to attract online shoppers.

1The underlined word “leery” in the first paragraph means being very sure. 1

2Consumer confidence in online shopping mainly relies on security in shopping. 2

3Internet giants, traditional retailers, courier companies and credit card companies have made contributions to the popularity of online shopping. 3

4The author think of the current online shopping as safe, convenient and fast. 4

Nowadays many companies are trying to cooperate with the online shoppers instead of traditional retailers. 5

__1__
  • T
  • F
__2__
  • T
  • F
__3__
  • T
  • F
__4__
  • T
  • F
__5__
  • T
  • F
单选题
__1__
  • T
  • F
单选题
__2__
  • T
  • F
单选题
__3__
  • T
  • F