形态细长、梭形或鼓槌状，有芽胞，有周鞭毛的厌氧菌是（） A.脆弱类杆菌 B.产黑素类

根据下列短文内容，在短文后的空格处填上一个恰当的词，使短文完整、通顺。

       Hello, I'm Jeff. I'm an English boy. But now I   1  in China. I'm a student in Chongqing No. One

Middle School. At school, I like English and P.E. Every afternoon, I play pingpong   2  my Chinese

friends. Oh, I also like   3  .On weekends I often go to movies with my friends. My   4  actors are Cheng

Long, Zhou Runfa and Li Lianjie. Their English  5  are Jackie Chan, Chow Yun-fat and Jet Li. I think   6  movies are all very exciting. Mary is my good friend. She's an English girl. She's in China,  7  .She

likes Beijing Opera. She often goes to  8   Beijing Opera with her parents. She says she learns a lot  9  

Chinese history from Beijing Opera. Oh, do you  10  Beijing Opera,too? Can you tell me ? Thank you.

小明发现关于x的方程★x-6=9中的的系数被污染了，要解方程怎么办？他翻开答案一看，此方程的解为x=-3，则★是（    ）。

操作系统在实现虚拟存储器时，可用的内存页面替换算法有多种，Windows98所采用的算法是( )。

A．最优淘汰算法(OP

B．先进先出淘汰算法(FIF

C．最近最少使用淘汰算法(LR

D．最近未使用淘汰算法(NU

心的特征（）

A、心尖平对第4肋间隙

B、心底与膈相贴

C、房间隔分为肌性部和膜部

D、右冠状动脉前室间支行于前室间沟

E、右心房、右心室位于左心房、左心室的右前方