题目：
第一节：完形填空
San Francisco is a big city which lies in the west of the United States very near the Pacific, where two earth's plates often meet and jump. So earthquake is a 1 word to hear there. It is recorded that at least 2 big earthquakes have happened in San Francisco since the beginning of the _3 century. One happened in 1906, the other in 1989.
The second worst earthquake _4 San Francisco on the evening of October 17, 1989, when people were traveling to their 5 . A wide and busy overhead road fell onto the one 6 _. Many people were killed in their cars. A few 7 ones were not hurt, but many thousands became 8 . A large number of weak buildings didn't _9 in the quake and the 10 electricity was cut off for several days, too.
( ) 1. A. terrible B. sad C. usual D. funny
( ) 2. A. two B. three C. four D. five
( ) 3. A. 17th B.18th C. 19th D 20th
( ) 4. A. shook B. felt C. discovered D. moved
( ) 5. A. offices B. homes C. factories D. schools
( ) 6. A. above B. nearby C. below D. round
( ) 7. A. young B. tall C. strong D. lucky
( ) 8. A. homeless B. jobless C. friendless D. childless
( ) 9. A. put up B. go up C. stay up D. turn up
( ) 10. A. company's B. school's C. country's D. city's
答案：
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答案：B题目分析：A、Zn具有还原性和导电性，可用作锌锰干电池的负极材料，正确；B、浓硫酸具有强氧化性，但是可以用浓硫酸干燥SO2，因为二氧化硫中的硫是正四价，浓硫酸中的硫是正六价，同种元素的原子相邻价态...
