下列动物疫病属于人畜共患病的有（）。
A.高致病性禽流感
B.猪囊尾蚴病
C.疯牛病
D.狂犬病
参考答案：A, B, C, D
----- What’s the model plane look like?
----- Well, the wings of the plane are ______ of its body.
A．more than the length twice
B．twice more than the length
C．more than twice the length
D．more twice than the length
组对铸铁散热器应（）紧密。
A、垂直
B、竖直
C、平直
D、正直
