题目内容：
Whydoes the author mention the explosion of the Challenger space shuttle and theRussian nuclear accident at Chernobyl?
A． Toshow the worry that technology may eventually destroy our world. A．To show the worry that technology may eventually destroy our world.
B． Totell the readers that as a human creation, technology may go wrong and do harmto human.
B． To tell the readers that as a human creation, technology may go wrong and do harm to human.
C． Toemphasize the responsibility we have in ensuring human safety in atechnological world.
C． To emphasize the responsibility we have in ensuring human safety in a technological world.
D． Tostress the fact that technology usually goes wrong if not given a closeexamination.
D． To stress the fact that technology usually goes wrong if not given a close examination.
参考答案：
答案解析：