春节时燃放鞭炮的声音，主要是通过______传播到我们的耳朵的，而之所以听出是鞭

关于免疫球蛋白，下列描述错误的是（）

A.是具有抗体活性的球蛋白

B.由浆细胞产生

C.存在于血液、体液及外分泌液中

D.不存在于细胞膜上

E.有特异性识别抗原的功能

In November of 2007, NBC Universal launched its first official Green Week. Throughout the week, NBC Universal presented over 150 hours of environmentally themed content across multiple platforms.

Now, NBC Universal is proud to present Green Week 2009. With a new theme and message of "Green Your Routine," Here at NBC and NBC.com we celebrate our talent in the "The More You Know" PSA campaign, presenting green-themed tips in several of our daytime life, among several other features here on the "Green Your Routine" site.

Fashion & Beauty

Throw a clothes swap party! Dying for that sweater your friend wore the other day? Well, maybe she'll trade for that old T-shirt you have. Here's a website that helps you organize a swap party (www.swapstyle.com), or just plan your own!

Go natural with organic make-up. Applying unnatural products directly on your skin wasn't exactly what nature intended. Try switching to a line of organic make-up and cosmetics for a different way to bring out your natural beauty.

Home

Drop a brick in your toilet tank! Literally! According to the EPA, flushing makes up 30 percent of a household's water use (about three to six gallons per flush). By placing a brick in your toilet tank, you can help to conserve the amount of water used during each flush.

Wash clothes efficiently. 90 percent of the energy used in washing clothes is to heat the water. You can reduce your energy bill by washing in cold water and hanging items to dry.

Work

Print smarter. Printing and copying can be one of the most costly operations in any office. To save on ink and paper costs, print double-sided and try to fit more than one page on a sheet. More printing tips can be found here: lifehacker.com

Turn off your computer. Do you leave your computer on overnight? If so, you're using up a good amount of electricity. When you can, try turning off your computer and the power strip it's connected to. If you can't, at least shut off your monitor. Remember, screen savers don't save energy.

Transportation

Organize a carpool. There are many benefits to carpooling. You save on gas, reduce wear and tear on your car, and you get to ride in the HOV lanes. Get connected with your neighbours and co-workers to start sharing rides and check out this website for more tips: www.erideshare.com.

Lose the car, get a bike. If you live close to where you work, try taking a bike instead of driving. You'll keep in shape and save on gas!

Every small step and effort makes a difference! Be sure to GREEN YOUR ROUTINE!

小题1:NBC Universal holds Green Week activities ___________.

A．in a university

B．in a park

C．in an office

D．on the internet小题2:This year, Green Week welcomes ____________.

A．advice on how to improve the website

B．suggestions about how to make their activities more interesting

C．tips on what to do to make our life greener

D．opinions on whether we should have campaigns小题3:If you want to carpool with somebody, you can find more advice and information at______.

A. www.swapstyle.com                                            B. www.erideshare.com

C. www. lifehacker.com                                           D. www. NBC.com

小题4:Which is NOT recommended(推荐) by Green Week this year?

A．Using things like cucumbers to beautify your skin.

B．Reducing the room of your toilet tank to save water when flushing.

C．Giving away your old clothes to those in need of them.

D．Printing and using computers in an economical way.

假设某计算机的存储系统由Cache和主存组成，某程序执行过程中访存1000次，其中访问Cache缺失(未命中)50次，则Cache的命中率是（）。

A.5% 

B.9.5% 

C.50% 

D.95%

对流管束的吸热情况，与（）都有关。

A.烟气流速

B.燃料的种类

C.管子排列方式

D.烟气冲刷的方式

通过去除工作的无效部分，并对技术进行改进，设计出一种最有效的标准工作方式进行人事管理研究的是（）

A.欧文

B.闵斯特伯格

C.霍桑

D.泰勒