甲乙两台柴油机，甲的效率低于乙的效率，意义是
利用相同燃料做功时，甲做的有用功比乙的少
工程建设项目乙级招标代理机构要求具有工程建设类注册执业资格人员不少于( )人。
A．3 B．4C．5 D．6
—Guess what, we've got our visas for a short-term visit to the UK this summer. —How nice! You（）a different culture then.
A. will be experiencing
B. have experienced
C. have been experiencing
D. will have experienced
