该投资项目的投资回收期为( )年。
A．2
B．2.5
C．3
D．3.5
参考答案：B
解析：100/40＝2.5(年)
The dog had such ________ to its master that it would not leave him, even when he was dead. [ ]
A. invitation
B. attention
C. protection
D. devotion
芬太尼可致（）
A.喉痉挛
B.颅压升高
C.醒后无宿醉感
D.肾上腺皮质功能抑制
E.胸壁僵直
