按通风系统工作( )的不同,建筑通风有自然通风和机械通风两种。
A.动力B.时间C.特点D.方式
参考答案:A
唐朝时期,我国对外交往十分活跃。下列表现中不是出现于该时期的是[ ]
A.鉴真六次东渡日本
B.日本派遣唐使到中国
C.玄奘西游天竺取经
D.郑和七次下西洋
— Could you _____ take care of my dog
—The expertthoughtthe coins the farmer had found under the ground were just copper _____ gold.
A.instead
B.rather than
C.more than
D.in place of