问题
单项选择题
对外源化学物生殖发育毒性的特点描述正确的是()
A.亚慢性及慢性试验中有剂量效应关系的化合物有生殖发育毒性
B.一般毒性大的化合物,产生生殖发育毒性的可能性就大
C.生殖发育过程对外源化学物的作用比其他系统或功能更为敏感
D.生殖发育毒性只影响当代动物(机体)
E.外源化学物必须直接作用于性腺才能产生生殖毒性
答案
参考答案:C
对外源化学物生殖发育毒性的特点描述正确的是()
A.亚慢性及慢性试验中有剂量效应关系的化合物有生殖发育毒性
B.一般毒性大的化合物,产生生殖发育毒性的可能性就大
C.生殖发育过程对外源化学物的作用比其他系统或功能更为敏感
D.生殖发育毒性只影响当代动物(机体)
E.外源化学物必须直接作用于性腺才能产生生殖毒性
参考答案:C
More Than I Had Dreamed Of From the time I was seven, I had a dream of becoming a member of the Students Union.I always 36 my school leaders for taking responsibility for all of us.So I dreamed of being a leader. Years flew by, and soon I was able to participate in the elections, 37 I would win.But the reality struck that I hadn't had a chance.I wasn't pretty.Girls across the school hardly knew me.I just did not have what it 38 to win a school election.I was 39 . As I cried in my room that evening, I 40 took a deep breath and decided I wouldn't stop dreaming.I decided that I would 41 for elections again in my final year at school—and I would win. I recognized that my 42 had a lot of things in their favor.What were the 43 that would work in my favor? I had good grades, and I was friendly and helpful.And my biggest 44 was the faith I had.I would not allow my 45 appearance to hold me back from putting my best foot forward.That evening, I 46 my election plans a whole year in advance. I realized that girls would have to get to know me and recognize that I had the ability to 47 them.I loved making friends and I liked being helpful, 48 I decided that perhaps I could use these qualities to work to my advantage.In order to learn how to present a great election 49 , I also attended a course on effective public speaking. The day after the election, when the principal announced I won the second highest number of votes, the students 50 That joy on the faces of all my friends showed me that my victory was 51 theirs. Suddenly, I realized that I had 52 much more than I had dreamed of.I had made many new friends and had helped people 53 the way.I had won the 54 and love of my school-mates and they knew me as somebody who would stand by them.I was able to put a smile on their faces and 55 their day.
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