[单项选择]A. It is inspired by an earthquake.
B. It is used for computers.
C. It is a self-rescue application.
D. It is a social networking website.

[单项选择]The high-tech revolution has inspired a seemingly endless stream of new and exciting electronic products that we just can’t live without. In fact, the dizzying speed of technological innovation can make last year’s must this year’s junk.
And that’s the problem. The average life span at personal computer has shrunk to around 19 months--and this has nothing to do with worn-out mice or damaged disk drives. Simply put, electronic products can become obsolete before you’ve even figured out how they work.
So what happens to all those old keyboards, monitors, organizers and CPUs Most are stashed away in the attic or forgotten in a corporate warehouse, taking up valuable space. But many end up in landfills, and that is where the trouble really begins.
Computer monitors can contain up to 3.5 kg of lead and can actually be considered hazardous waste once they are no longer in use. Circuit boards in electronic products contain cadmium(镉), chromium(铬) and mercury, all of whic
A. the issue of technological innovations
B. the necessity of updating computer hardware
C. the conservation of natural resources
D. the disposal problem of electronic products

[单项选择]Few insects have inspired as much fear and hatred as the diminutive fire ants, less than half an inch long but living in colonies of more than 250,000 others. Everyone in the southern United States gets to know fire ants sooner or later by painful experience. Fire ants live in large earthen mounds and are true social insects--that means they have a caste system (division of labor), with a specialized caste that lays eggs (queen) and a worker caste of sterile females. There are several reasons that they are considered pests. About 60% of people living in areas where fire ants occur are stung every year. Of these, about 1% have some degree of allergic reaction ( called anaphylaxis ) to the sting. Their large mounds are unsightly and can damage mowing equipment. Fire ants sometimes enter electrical and mechanical equipment and can short out switches or chew through insulation. Finally, as fire ants move into new areas, they reduce di
A. throwing.
B. castle.
C. rank.
D. level.