男，18岁，发现贫血、黄疸4年。脾肋下3cm．质中。血红蛋白85g/L，网织红细胞0

只列式，不计算：

（1）某小学春季植树成活200棵，其中10棵没有成活，这批树苗的成活率是多少？

（2）一个底面直径是4分米，高是10厘米的圆柱，它的侧面积是多少？

一般认为现代管理理论是从（）以来直到20世纪80年代初的整个历史阶段中西方的管理理论。

缺词填空（5分）

All over the world people e_______（1） sports. Sports help one to keep h______（2）, happy, and to live longer. Many people like to watch o______（3） play games. They buy tickets or turn on their TVs to watch the games. Often they get very excited when “their” player or team w______(4).

Some sports are so i________（5）that people everywhere like them. For example,more and more young people like playing football.

Some sports or games such as running and jumping go back t______（6）of years. But basketball and v________（7） are rather new.

People from d_________（8） countries may not u_______（9）each other, but after a game together they often become good f______（10）.

逐步退焊法是（）每段由后向前焊。

A.长焊道分成短焊道

B.分段分层

C.长焊层分成一段段的短焊层

D.使零件受热均匀

识别暴恐分子有哪些小技巧？