把4米长的彩带剪成同样长的8段做装饰，每段彩带长多少分米？
4米=40分米
40÷8=5（分米）
The sports shoes _________ ￥128. [ ]
A. is on sale
B. are on sale
C. are on sale for
D. is on sale for
制图题：画出同步发电机励磁回路绝缘电阻测量原理图。
