斜刺的角度应为
A.15°左右
B.25°左右
C.35°左右
D.45°左右
E.60°左右
参考答案:D
64. I suggest you having plenty of exercise instead of playing _____ day and night.
A.with cards
B.at chesses
C.for money
D.the card
一个AB型血的病人因大量出血需要输血,输入血的血型应是( )
A.A型
B.B型
C.O型
D.AB型