上海市郊农业主要种植花卉、蔬菜，发展肉、乳、禽、蛋生产，影响的主要因素是[ ]
A．自然条件
B．市场需求量
C．农业技术装备
D．农民文化技术水平
答案：B
用恰当的关系代词填空。
1. The man _________ came to our classroom yesterday wanted me to lend him the book ________
I borrowed from the library.
2. The girl, _________ hair is very long, sings very well.
3. The boy _________ we saw this morning is from Shenzhen. He has a model plane ________ can fly
very high.
微血管病性溶血性贫血最常用的检查方法是
A．红细胞计数
B．血红蛋白浓度测定
C．末梢血红细胞形态镜检
D．红细胞脆性实验
E．血浆胆红素测定
