以下哪项属于动产交付（）
A.现实交付
B.虚拟交付
C.现金交付
D.支票交付
参考答案：A
It's two and a half weeks since the exchange students _____Wuxi. [ ]
A. arrived
B. reached
C. have been in
D. have arrived in
如果拟在山区建厂，下列哪个地区比较适合？
A．山谷走向与盛行风向呈45°～135°，谷内风速很小B．烟囱有效高度小于下坡风厚度和背风坡湍流高度C．烟流越过山顶，但在背风坡有可能造成污染D．海陆风盛行的山地和水域交界的背山地段，厂址与居民区的连线与海岸线平行
