溃疡病时病理组织损伤至少深达哪一层（）
A.黏膜层
B.黏膜下层
C.黏膜肌层
D.肌层
E.黏膜和肌层
参考答案：A
The child ______ in the countryside knows how to _____ animals like dogs, pigs and so on.
A．raised; bring up
B．brought up; raise
C．fed; raise
D．fed up; bring up
三角形中最大角α的范围为（ ），最小角α的范围是（ ）．
