【简答题】A.It works on wet suces. B.It's stronger than synthetic glue. C.It's a nutritious source of protein. D.It has been used successfully by doctors.
【简答题】将细胞保存在生理盐水中可以长时间维持其性状;若保存在纯水中则易溶胀甚至破裂,保存在浓食盐水中则易皱缩,试用物理化学原理解释该现象。
【多选题】物流快递行业发展很快,各快递公司在覆盖范围、价格、服务质量等方面各有不同,因此在选择快递公司时,应综合考虑的问题包括
【多选题】车轮不平衡的原因主要有()。
A.
轮辋、轮胎在生产、装配和修理过程中的精度误差
【简答题】A.It works on wet suces. B.It's stronger than synthetic glue. C.It's a nutritious source of protein. D.It has been used successfully by doctors.