常用磁性材料中,硅钢片为()材料。
A.硬磁
B.软磁
C.中性
D.剩磁
参考答案:B
-- Look at the boy running on the ground. Is it David?
-- It _______ be him. I saw him go to the teacher’s office just now.
A.might
B.could
C.can’t
D.mustn’t
黄龙汤煎时加桔梗一撮的主要用意是()
A.升提以防正脱
B.宣肺以利咽
C.宣肺以排脓
D.宣肺以化痰
E.宣肺以降腑气