题目

下列有关种群或群落的说法，正确的是 A.群落有空间特征(结构)，种群没有空间特征 B.森林动物的垂直分层主要与光照有关 C.一个物种被引入到新环境的开始几年内，种群数量变化接近“J” 形增长曲线 D.在进行土壤中小动物种群密度的调查时，通常不用标志重捕法 答案：D    Manners are important to happy relations among people. No one 1 a person with bad manners. A  2  with good manners never laughs at people when they are in trouble. Instead, he 3 to help them. When he asks for something, he says " 4  And when he receives something, he  5  says "Thank you". He does not interrupt (打扰） 6  people when they are talking. He does not talk loudly or laugh loudly 7 public. When he sneezes or spits (吐痰)， he uses a 8 If he is late, he should 9 an apology to the teacher either at the time . 10 after class.(       )1. A. thinks       B. likes            C. hates          D. finds(       )2. A. boy           B. girl            C. person         D. people(       )3. A. tries         B. needs            C. has           D. enjoys(       )4. A. Give me        B. Please            C. Yes           D. Hello(       )5. A. never       B. even           C. usually         D. still(       )6. A. every        B. some            C. others          D. other(       )7. A. on              B. at            C. of              D. in(       )8. A. book         B. cup            C. handkerchief        D. hand(       )9. A. make            B. take             C. lose           D. bring(       )10. A. or              B. nor             C.and        D. but