有些媒体单纯追求轰动效应，热衷于捕风彤影的“新闻"炒作，不负责任地传播“绯闻轶事”、

The reason why international trade is more costly is that a border typically imposes additional costs such as( )，time costs due to border delays and costs associated with country differences．

A．production

B．tariffs

C．capital

D．goods

为什么说细菌和病毒是遗传学研究的好材料？

—What do you think of your new friend Annie?

—She’s a top student(好学生). But she is            at sports than me.

A．good

B．better

C．bad

D．worse

技术设计阶段应编制修正概算。

加油站资金安全管理要做哪些工作？