弦AB把圆分成1∶3两部分，则AB所对的劣弧等于（ ）度，AB所对的优弧等于（ ）度。
90，270
Nowadays there are still a number of students school at various grades due to a lack of money in
some poorer areas.[ ]
A. leaving out
B. making out
C. letting out
D. dropping out
在宗地地价评估中，方法的选取一般不应少于（）个。
A.2
B.3
C.4
D.5
