2．当植物受到环境刺激时，右图所表示的生长素分布与生长的情形正确的是(黑点代表生长素的分布)

A．①④⑥

B．②④⑧

C．③⑤⑥

D．②⑤⑦

1．下列关于细胞增殖的表述，正确的有　 　　　　　　　　　　　　　　　　　

①二倍体动物体细胞有丝分裂后期，细胞每一极均含有同源染色体

②二倍体动物体细胞有丝分裂过程中，染色体上的DNA平均分配

③二倍体生物减数第二次分裂后期细胞中，染色体数目为2的倍数，不含同源染色体

④二倍体生物减数第二次分裂后期细胞中，有2个染色体组，含同源染色体

A．一项　　　B．两项　　　C．三项　　　D．四项

Dear David

I'm glad to hear that you'll be an exchange student and come to Wuxi to learn Chinese. Chinese is very useful and many foreigners are learning it now. It's difficult for you because it's quite different from English. You have to remember as many Chinese words as possible. It's also important to do some reading and writing. You can watch TV and listen to the radio to practice your listening. Do your best to talk with people in Chinese. You can learn Chinese not only from books but also from people around you. If you have any questions please ask me. I'm sure you'll learn Chinese well.

Hope to see you soon in Wuxi.

Yours

Chen Jun

73. work　　　　 74. during　　 75. had 　　　　　　　 76. love　　　 77. brought 　　　 　78. but

67. country　　 68. built 　　 69. wife　　 70. married　　 71. followed　 72. advised

66. At that time, Grandpa had no choice but to sell his own house.

65. This sentence can be divided into three parts.

64. At home, Tom and his brother often argue about what TV programmes to watch.

63. Our English teacher is very friendly, and she always wears a smile on her face.

62. It is meaningful for each of us to save water.