________ your friend like English? [ ]
A. Does
B. Do
C. Is
D. Has
答案:A
甲数除乙数的商是12,甲乙两数的最大公约数是( )
A.甲数
B.乙数
C.12
D.无法确定
悬臂梁受载情况如图所示,在截面C上:().
A.剪力为零,弯矩不为零
B.剪力不为零,弯矩为霉
C.剪力和弯矩均为零
D.剪力和弯矩均不为零