决定和影响劳动生产率高低的因素主要有A．劳动者的平均熟练程度 B．科技发展水平及应

第一节短文改错(共10小题；每小题1分，满分10分)

People communicate in words. Do you think you can communicate without words? A smile on your face show you are happy but friendly. Tears in eyes tell the others that you are sad. When you put up your hand in class, the teacher knows you want say something. Other things should also carry messages. For example, a sign at the bus stop helps you to know which bus to carry. Signs on the door tell you if to go in or out. Have you ever seen that there are a lot of sign around you and that you receive messages from it all the time?

在PowerPoint中，下列哪一项为「格式」工具列之工具钮的功能？（）

A、设定字型色彩

B、增加字号

C、插入文字方块

D、变更文字方向

超声波雾化接通电源后要预热(　　)，再开雾化开关。

A．10秒钟

B．1分钟

C．3分钟

D．10分钟

疑源类是具有机壁、亲缘关系不明的多细胞微体化石。

汉赋的主流是（）

A、抒情述志的短赋

B、以铺陈排比为主要手法的“体物”大赋

C、以议论为主的短赋

D、以说明为主的大赋