上颌后腭杆放置的正确位置是A．第一、二前磨牙之间，中部微凸向前方 B．第二前磨牙与第

汽车产品的基本消费属性和特点包括（）。

A.产品价值量高

B.耐用性消费品

C.一次性消费品

D.重复性消费品

The teenage year from 13 to 19 were the most difficult time for me . They were also the best and worse years in my life . At the first, I thought I knew everything and could make decisions by yourself. However, my parents didn’t seem to think such. They always tell me what to do and how to do it. At one time , I even felt my parents couldn’t understand me so I hoped I could be freely from them. I showed them I was independent by wear strange clothes. Now I am leaving home to college. At last, I will be on my own, but I still want to have my parents to turn to whenever need help.

8（）

原码表示法和补码表示法是计算机中用于表示数据的两种编码方式，在计算机系统中常采用补码来表示和运算数据，原因是采用补码可以（）

A.保证运算过程与手工运算方法保持一致

B.简化计算机运算部件的设计

C.提高数据的运算速度

D.提高数据的运算精度

“无德无才是‘废品’，有德无才是‘半成品’，有才无德是‘危险品’，有德有才是‘精品’。”这一比喻表明（）

A.科学文化修养比思想道德修养更重要

B.科学文化修养和思想道德修养是有机统一的

C.有德无才与有才无德都是社会需要的人才

D.思想道德修养比科学文化修养更重要