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【多选题】
下列属于我国标准物质的是( )。A.
化工产品成分分析标准物质
B.
安全卫生标准
C.
食品成分分析标准物质
D.
建材成分分析标准物质
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【简答题】衡量小家电首要质量指标的是
【简答题】A man came home from work late , tired and unhappy, to find his5-year-oId son waiting for him at the door. The boy asked, " Daddy, how much do you make per hour?" " If you must know, I make $20 per ho...
【简答题】Thomas Edison was born in 1847. When he was 1 child, he liked to 2 how things worked. One day when he was five, his father saw him 3 on some eggs, and asked him what he was doing that for. Tom didn’t ...
【单选题】The boy was asked by his father to take over many of the________previously performed by the janitor.
A.
duty
B.
duties
C.
work
D.
works
【多选题】Complete the passage with items from the box. 在空白处填上合适词汇的选项。
A.
strange
B.
scientist
C.
hard
D.
child
E.
worth Thomas Edison was a famous American 1 . When he was a 2 , he liked to find out how things worked. He was in school for only three months. He asked his teacher a lot of 3 questions. Most of them had nothing to do with his lessons. The teacher thought the boy was not bright and was not 4 teaching. Nevertheless, n o matter how 5 it was, Edison never gave up.
【简答题】Have you ever been sad because of failure? Please remember, for often, achieving what you set out to do is not the most important thing. A boy decided to dig a 1 hole behind his house. As he was 2 , a...
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