单项选择题According to theUnited Nations Convention on Contracts for the International Sale of Goods (CISG), if an offer is made in writing, the acceptance must also be in writing. A、正确 B、错误
单项选择题细菌与真菌在细胞结构上最主要的区别是: A 细菌有细胞壁而真菌没有 B 细菌有荚膜而真菌没有 C 细菌无成型的细胞核而真菌有 D 细菌有鞭毛而真菌没有
