溶血性贫血（）
A．骨髓增生极度活跃
B．骨髓增生明显活跃
C．骨髓增生活跃
D．骨髓增生减低
E．骨髓增生极度减低
参考答案：B
选择画线部分的对应词。
1. This shirt is too big. That one is too .[ ]
A. small
B. good
2. This pencil is black. That one is .[ ]
A. red
B. white
3. The girl is a pupil. The is a pupil, too.[ ]
A. man
B. boy
4. That coat is good. coat is good, too.[ ]
A. This
B. The
5. This hat is new. That one is .[ ]
A. old
B. new
技术筛选的基本原则应满足哪几个方面的要求？
