集装箱主要分为 ( )
A、下货舱集装箱ABCD
暂无解析
While building a tunnel through the mountain,_________.
细胞膜的选择透过性保证了细胞内相对稳定的微环境。下列物质中,以(自由)扩散方式通过细胞膜的是()
——Who knocked at the door?
——I’ve no idea. I just pretended nobody was at home, so I didn't ask who _____ was.
关于我国工业地区和工业地带的叙述,正确的是:()
下列各句加点成语使用恰当的一项是