关于股份的含义，下列说法错误的是( )。A．股份是股份有限公司资本的构成成分 B．

美国最大的城市是[ ]

A、华盛顿

B、旧金山

C、洛杉矶

D、纽约

Last weekend I went to the Summer Palace as usually. At about noon, I was enjoying my reading near a lake while suddenly I hear someone crying for help. I went up to see what was happening. I was shocking to find a little child struggling in the water in the distance while many people standing by without doing anything. Without any hesitation, I had pushed through the crowd and I took off my coat, but jumped into the water quickly. I managed to reach him and carried him back to safety. To his great relief, the kid was saved.

I was proud what I had done. I wish everyone can give hand when someone else is in need.

葡萄球菌感染可引起烫伤样皮肤综合征的是（）

A.溶血素

B.杀白细胞素

C.表皮剥脱毒素

D.肠毒素

E.毒素休克综合征毒素

E级绝缘材料的最高工作温度为（）。

A.90℃

B.105℃

C.120℃

在微型计算机系统中运行某一程序时，若存储容量不够，可以通过下列哪种方法来解决：

A．扩展内存

B．增加硬盘容量

C．采用光盘

D．采用高密度软盘