问题
填空题
采用矿用防爆柴油机动力装置时，油箱必须用（）材料制造。
答案
参考答案：不燃性
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采用矿用防爆柴油机动力装置时，油箱必须用（）材料制造。
参考答案：不燃性
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| Nine-year-old Barack Obama was looking through a magazine. But the African- American 1 was shocked by a series of photos. The pictures were about a black man who 2 his skin with chemicals (化学制品) that promised to 3 him white. For the first time, the boy began to doubt who he was."I stood 4 the mirror and wondered if something was wrong with me," Obama said. However, now the boy who used to struggle with his identity (身份) doesn't see it as a problem any more, but an advantage for his 5 career. Obama made history by being elected as the first 6 president of the United States. He 7 John McCain in a landslide (压倒性的) victory. Obama's 8 starts in opposite corners of the world. His white mother was born in the heartland of the US. His black father 9 in a small village in Kenya. They met during college in Hawaii, 10 his father left the family when Obama was just two years old and his mother moved to Indonesia. 11 10,Obama moved back to live with his white grandparents in Hawaii. At his class, a white boy asked Obama 12 his father ate people. Out of embarrassment (尴尬),Obama 13 his classmates that his father was a prince."I kept 14 who I am and I ended up trying drugs and drinking," Obama recalled (回忆). Things came to change 15 the young man made friends with those with a similar background at college. 16 experiences helped Obama to finally face up to his 17 origin (血统). He worked hard to become a 18 at Harvard Law School. Obama 19 his pain of growing up into a tool to make Americans believe: "There is not a black America and a white America, a Latino America, an Asian America. There's the United States of America." "Obama's success has made Martin Luther King's dream come true. That is:A man should not be judged by the 20 of his skin, but by the content (内涵) of his character (性格),"wrote ABC News. | ||||
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