2. C。 细节理解题。根据Morrison所著书中的黑人都有着悲惨的命运,可推知她的书所产生的效应。

　　3. B。 细节理解题。文中总共提到了六本她写的书。

　　4. C。 细节理解题。选项A、B、D分别可在文章第一段、第三段、第四段找到依据。

　　B段

　　Which is safer --- staying at home, traveling to work on public transport, or working at the office? Surprisingly, each of these carries the same risk, which is very low. However, what about flying compared to working in the chemical industry? Unfortunately, the former is 65 times riskier than the latter! In fact the accident rate of workers in the chemical industry is less than that of almost any of human activity, and almost as safe as staying at home.

　　The trouble with the chemical industry is that when things go wrong they often cause death to those living nearby. It is this that chemical accidents so newsworthy. Fortunately, they are extremely rare. The most famous ones happened at Texas City (1947), Flixborough (1974), Seveso (1976), Pemex (1984) and Bhopal (1984).

　　Some of these are always in the minds of the people even though the loss of life was small. No one died at Seveso, and only 28 workers at Flixborough. The worst accident of all was Bhopal, where up to 3,000 were killed. The Texas City explosion of fertilizer killed 552. The Pemex fire at a storage plant for natural gas in the suburbs of Mexico City took 542 lives, just a month before the unfortunate event at Bhopal.

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