广西有较长的海岸线,海洋给我们提供了丰富的资源,包括化学资源、矿产资源、生物资源和动力资源等.
⑴What is this? ____ A. Thursday.
⑵What are these?____ B. Yes, it is.
⑶What is she wearing?____ C. They're shorts.
⑷Is this a new cap?____ D. She is wearing a blue skirt.
⑸What day is today?____ E. It's a new T-shirt.
相对分子质量最小的有机物电子式____,食醋中的有机物结构式____.
一台碾米机 34 小时可以碾米 512 吨,1小时碾米____吨,碾1吨米要____小时。