剖检发现主要病变为纤维素性胸膜肺炎的病是（）
A.仔猪副伤寒
B.猪传染性胸膜肺炎
C.猪瘟
D.猪丹毒
E.猪圆环病毒病
参考答案：B
A．位移
B．力
C．路程
D．速度
My brother fell off his bike and hurt himself.（）
A.How careless he was!
B.I'm sorry to hear that.
C.That's too bad.
D.I'm bad to hear that.
