What happened to Eddie at the Olympics?
A. He came in last place.
B. He took a medal home.
C. He was judged unfairly.
D. He was injured in the game.
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What can we infer about Eddie?
A. He had some physical problems.
B. He was inspiring.
C. He wasn't a born skier.
D. He was strong-willed.
What did Allen mean when he said “everyone can be Eddie”?
A. Everyone can go to the Olympics.
B. Everyone has limitations in life.
C. Everyone has a chance to realize their dream.
D. Everyone can turn their life story into a movie.
否定之否定规律揭示事物发展要经过两次否定,三个阶段才能得到充分的发展。其中“三个阶段”是指_________、___________和______________。
【单选题】在供体细胞和受体细胞直接接触后,质粒从供体细胞向受体细胞转移的过程叫做( )。
A. 接合
B. 转化
C. 转导
D. 转染