第五步 A．将插管向输卵管开口处插入0.5cm左右 B．探宫腔 C．从插管中缓慢注入

Last week my parents and I took a twoday trip to Emei

Mountain in Sichuan. As everyone knows, it's famous           76. _______    

mountain with all kinds of plants and animals. The weather    77. _______    

was fine. It was about noon we arrived at the foot of         78. _______    

the mountain. The three of them were very excited. As we      79. _______    

climbed the mountain, we fed monkeys, visiting temples        80. _______    

and told stories. On the way up I was busy taking picture     81. _______    

since the scenery was so beautiful. The time passes quickly.  82. _______    

Evening came down. We spent the night in a hotel at the top   83. _______    

of the mountain. The food was expensive and the service was   84. _______    

good. I was so tired that I fell asleep at the moment my      85. _______    

head touched the pillow.

— Why did he ask you to ______ his pet dog?

— Because he was away for two weeks. [ ]

A. take out

B. look at

C. depend on

D. look after

分析材料，回答有关问题：

我国科学工作者经研究发现一种生活在棉铃虫消化道内的苏云金杆菌能分泌一种毒蛋白使棉铃虫致死，而此毒蛋白对人无害．通过科技攻关，我国科技工作者已成功地将该毒蛋白基因导入棉花植株内并成功实现表达．由于棉铃虫吃了新品种“转基因抗虫棉”植株后就会死亡，所以该棉花新品种在1998年推广后，已取得了很好的经济效益．

（1）苏云金杆菌属于细菌还是真菌？______．

（2）从资料中可以看出苏云金杆菌的营养方式是______．

（3）该项成果中运用了______技术，实现了棉花遗传物质的改变．

（4）该项研究的成功，也可以证明生物的性状是由______决定的．

（5）这种以菌治虫的方法有何优点？______．

下面哪项不是实体式编码方式的优点（）

A.邻接关系明确

B.编码容易

C.数字化操作简单

D.数据编排直观

徐州是《白毛女》编剧谁的故乡？