抗原抗体反应的环境因素主要有_______、______、_____。

下列现象中属于光的折射的是[ ]

A．铅笔好像断了

B．水中倒影

C．小孔成像

D．小红照镜子

いえに　ついた　ときには、すっかり　ひが　（　　　　）　いました。 　　

A．さがって

B．おりて

C．くれて

D．おれて

解客户需求的途径有（）

A、利用动销台账获取零售客户需求信息

B、公司内部的报表

C、通过零售客户提报的形式获取需求

D、开展零售客户调查

阅读理解。

     Fruit powered digital clock

     Fruit's not only good to eat, but it can also power this Fruit Digital Clock. This clock uses the scientific

principles on which modern electrical storage batteries are based. The acid (酸) from the fruit helps transmit

an electrical flow between two metal poles. The clock is priced at US $ 15. Adding any fresh fruit or vegetable

to the clock will make it work. The fruit is a clean, renewable source of electrical power.

     USB vacuum

     Do you know the dirtiest parts of your desk are probably your keyboard and mouse? Get a USB Mini V

acuum with retractable (可伸缩的) cable and suck away all that junk. The US-made product is priced at

US $ 14.

     SIM card reader

     Making useful USB 2.0 multi-card reader even handier, this card can also read and write data to phone SIM

cards. It comes with SIM editing software. Download your phonebook to your computer. If you lose your cell

phone, you can store missing phone numbers in your new one the US-made IMOMO SIM card+Multi-Card

Reader is priced at US $ 19 (152 yuan).

     Beer in your ear

     The beer barrel (桶)-shaped Naf Naf Hyp MP3 is a musical box that's capable of playing radio, CDs and

cassettes. It's got all the standard features of the typical clock-radio, but with the relaxing look of a big beer

barrel. The Danish product is priced at about US $ 130 (1040 yuan).

1. If you have 115 yuan, which product can you buy according to the passage? [ ]

A. Fruit powered digital clock

B. USB vacuum

C. SIM card reader

D. Naf Naf Hyp MP3

2. Which of the following statements is TRUE? [ ]

A. Fruit and vegetables cannot be used as batteries to make a clock work.

B. USB vacuum can be used to clean your house and yard.

C. With SIM card reader you won't lose phone numbers.

D. Naf Naf Hyp MP3 can play radio, DVD and cassettes.

3. What does "junk" mean in the second item? [ ]

A. dirt

B. desk

C. keyboard

D. mouse

4. The passage is most likely a(n) _____. [ ]

A. entertainment information

B. science reports on new high-technology

C. introduction of some kinds of musical boxes

D. advertisement for new products

5. SIM card reader can be used to _____. [ ]

A. edit all the data in your computer

B. remove data in phone SIM cards specially

C. help restore your phone book in a new cell phone

D. transfer any file between a computer and a cell phone

“社会赞许与不赞许”是我们看待青少年行为最常选择的视角。对于不赞许的行为，就容易进行负面描述。因此不听话就成了叛逆(而不叫有自主性)，不爱学习就成了不用功及偷懒 (而不叫非学业性向较高)，自然，喜欢上网也就成了网络上瘾(而不叫高度热衷网络)。 这段话意在说明( )。

A．人们对青少年的评价总是围绕着“好与坏”的二元判断标准进行

B．对青少年的评价多半是负面的

C．青少年大部分都不听话

D．青少年上网成瘾已成了社会现象