题目

下列关于生物教材中实验操作、实验结果、实验现象及原理的描述，正确的是 A．分离叶绿体中的色素时，绿色的色素带距离滤液细线最远 B．秋水仙素可抑制染色体着丝点分裂，能诱导染色体数目加倍 C．豌豆杂交实验中，应注意母本去雄及套袋时机 D．将胚芽鞘分别置于单侧光下和无光环境中，探究其感光部位下面短文中标有题号的十行中均有一处错误，请先用底线标明，然后将改正后的答案写在相应题号后的横线上。 Dear Henry, I’m glad to receive your letter. It’s a pleasure for me to tell your my plan of this                             1. _________________ coming summer holidays after the exam.                                        2. _________________ First of all, a good rest is need because                                          3. _________________ I feel very tired after the hardly work of all these years.                    4. _________________ Of course, I’ll do some reading for funny.                                      5. _________________ I’ll spend some time stay with my parents,                                      6. _________________ talking with them but doing some housework.                                 7. _________________ They’ve done so many for me, you know. If possible,                            8. _________________ I’ll take part for some social activities so that                                  9. _________________ I can knew more about the society.                                                       10. _________________ Best wishes！