华支睾吸虫病的感染途径是()
A．呼吸道
B．消化道
C．血道
D．虫媒
E．其他
参考答案：B
It is not that I do not like plays. The reason why I did not go to the theater last night was that I could not（）the time.
A．offer
B．leave
C．afford
D．manage
简述影响球场难易度的人为因素有哪些？
