题目

--- Mr. Kidd, I find it interesting that the man just left spoke with a strong accent similar to yours. --- You’re right. He comes from       I was born, and we’ve been friends since childhood. A．where            B．which           C．that           D．when 答案：A如图b是一个核苷酸分子模式图，由1分子磷酸、1分子碱基和1分子a构成，则下列叙述不正确的是A. 若a为核糖，则由b组成的核酸可被吡罗红染成红色B. 组成该化合物的元素有C、H、O、N、P五种C. a属于单糖，是细胞中不能水解的糖类D. 蓝藻细胞内含的化合物b中，m只有4种