定钳盘式制动器
参考答案:
制动钳本身的轴向位置固定,轮缸固定在制动盘两侧,除活塞和制动块外无滑动体。
Betty is an American. She speaks English. She can also speak a little Chinese. She’s in Beijing now. She’s studying in a primary school(小学) of Beijing. She has classes on weekdays(工作日). On Sundays she often plays games with her Chinese friends. Her father is working in Beijing. Her mother teaches English in a middle school of Beijing. Betty and her father like Chinese food. And they like China and Chinese people very much.
根据短文内容辨别正(T)误 (F)
小题1:Betty and her parents are in China.
小题2:Betty is a middle school student in Beijing.
小题3: Betty has no class on Sundays.
小题4:Betty can’t speak Chinese.
小题5:Betty likes Chinese food, but her father doesn’t.
平行四边形:长方形:正方形
A.点:线段:三角形 B.三角形:等腰三角形:等边三角形C.线段:三角形:四边形 D.直线:平面:空间