化学在生产和日常生活中有着重要的应用。下列说法不正确的是（ ）
A．SO2常用于纸张等植物纤维的
漂白
B．工业上可用铝热反应大规模炼铁
C．光导纤维的主要成允是SiO2
D．电解熔融MgCl2，可制得金属镁
答案：B
用铝热反应大规模炼铁，从经济角度不划算，该法可适用野外钢轨焊接，错；SO2
有漂白性用于纸张等植物纤维的
漂白；活泼金属的制取一般用电解法。
| 改正下列句子。 | |
| 1. This house built 100 years ago. 2. Football plays in most countries of the world. 3. Why did the letter send to the wrong address? 4. A garage is a place where cars repair. 5. Where are you born? 6. How many languages are speaking in Switzerland? 7. Somebody broke into our house but nothing stolen. 8. When was invented the bicycle? | __________________ __________________ __________________ __________________ __________________ __________________ __________________ __________________ |