题目

小王同学在游泳后，从深水处向浅水处步行上岸的过程中     A．他所受的重力逐渐增大            B．他所受的重力逐渐减小     C．他所受的浮力逐渐增大            D．他所受的浮力逐渐减小 答案：DFruit powered digital clockFruit’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 from the fruit helps transmit an electrical flow between two metal poles. The clock is priced at US$14.95. Connecting any fresh fruit or vegetable to the clock will make it work. The fruit is a clean, renewable source of electrical power.USB vacuumDo you know the dirtiest parts of your desk are probably your keyboard and mouse? Get a USB Mini Vacuum with retractable(可伸缩的) cable and suck away all that gunk. The US- made product is priced at US$ 14.SIM card readerMaking 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 (152yuan).Beer in your earThe 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 (1,024yuan)64．If you have 115 yuan , which product can you buy ?A．Fruit powered digital clock         B．USB vacuumC．SIM card reader                        D．Naf Naf Hyp MP365．What statement is not true?A．Fruit and vegetables can be used as batteries to make a clock work .B．USB vacuum can be used to clean room.C．With SIM card reader you won’t lose phone numbers.D．Naf Naf Hyp MP3 can play radio, CDs and cassettes with a looking of a big beer barrel.66．What does “gunk” mean in the second item?A．dirt                 B．desk               C．keyboard        D．mouse 67．The passage is mostly likely a(n )___________.A．entertainment information B．science reports on new high-technologyC．introduction of some kinks of musical boxesD．advertisement for new products