男性，38岁，头晕、心悸、双下肢皮肤出血点2个月。体检示浅表淋巴结和肝脾不大。血常规

通读短文，根据首字母填写单词，使短文完整流畅。

     What is a library for? Most libraries have books and other things to (1)r           . Many of them have

things to listen to. Some libraries even have (2)c           . Very (3)f            people would think of a library as

a place to live in.

     One library in New York City (4)t            into a home for 250 people for a few days. There were people (5)e            in the library. They slept on the floor. (6)W            did the people move into the library?

     The people moved into the library (7)b            the city wanted to close it to (8)s            money. These 250

New Yorkers loved their library. They didn't want to (9)l            it. So they moved in. They knew that the

library couldn't be closed if they were living inside it. At last, the city (10)a            to keep the library open,

and the people all went home.

下列各组反应（表内物质均为反应物）刚开始时，放出H₂的速率最大的是[ ]

　金属（粉末状）　物质的量　　酸的浓度　酸的体积　反应温度

A．　　Mg　　　　　0．1mol　　6mol/L硝酸　10mL　　　60℃

B．　　Mg　　　　　0．1mol　　3mol/L盐酸　10mL　　　30℃

C．　　Fe　　　　　 0．1mol　　3mol/L盐酸　10mL　　　60℃

D．　　Mg　　　　　0．1mol　　3mol/L盐酸　10mL　　　60℃

FILLET命令只能对二维图形作倒圆角处理。

婴幼儿不良习惯造成错畸形时，应在几岁以后采用矫治器治疗（）。

A．2岁

B．4岁

C．6岁

D．8岁

E．12岁

椭球面上任意一点的平均曲率半径R等于该点（）和（）的几何平均值。