我国高新技术产业主要分布在[ ]
A、自然资源丰富的地区
B、科技实力雄厚的地区
C、交通运输便利的地区
D、劳动力密集的地区
答案:B
The two friends were ________ pleased to see each other that they talked on and on happily in the park.[ ]
A. to
B. so
C. quite
D. much
往复式压缩机的管道振动主要表现在气缸到缓冲器的管段上。( )