Fruit powered digital clock
Fruit’s not only good to eat，but it can also power this Fruit digital Clock. This clock use the scientific rules on which modern electrical storage batteries are based, The acid from the fruit helps transmit(传递)an electrical flow between two metal poles。The clock is priced at US $15.Connecting any fresh fruit or vegetable to the clock will make it work．The fruit is a clean，renewable source of electrical power．
USB vacuum
Do you know the dirtiest pans of your desk are probably your keyboard and mouse? Get a USB Mini Vacuum with retractable(可伸缩的)cable and suck（吸） away all that gunk．The US-made product is priced at US$ 14．
SIM card reader
Making useful USB 2．0 multi—card readers 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．
Beer in your earw*
The beer barrel(桶)-shaped Nat Naf Hyp MP3 is a musical box that can be used to play 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.
49．What is TRUE about Fruit powered digital clock?
A．It gives out the smell of the fruit．B．It uses the fruit as its power．
C．It also needs batteries．
D．As a limited source，any fruit or vegetable connected to the clock will do．
50．What does “gunk” mean in the second item?
A．dirt B．desk C．keyboard D．USB
51．Which of the following statements is True?
A．If you have US$30，you can buy a USB vacuum or a Nat Naf Hyp MP3．
B．USB vacuum can be used to clean your house and yard
C．With SIM Card reader you may not lose phone numbers．
D．Nat Naf Hyp MP3 can also play radio，CDs and cassettes when used as a beer barrel at the same time.
52．The passage is mostly likely a(n) .
A．entertainment information B．science reports on new high-technology
C．introduction of some kinds of cell phone or computer parts
D．advertisement for new productsw*