问题
选择题
— Would you like something to drink, _______ or coffee?
— Coffee, please. [ ]
A. tea
B. meat
C. fruit
D. bread
答案
答案：A
搜题请搜索小程序“爱下问搜题”
— Would you like something to drink, _______ or coffee?
— Coffee, please. [ ]
A. tea
B. meat
C. fruit
D. bread
答案：A
t，截面B的最大动弯矩为：（）