题目

At first his plan seemed impossible to put into practice, but ___it turned out to be quite easy. A. ever since      B. so far      C before long       D. above all 答案：C下列关于芽孢的叙述中，错误的是（　　）A．芽孢可以萌发出一个细菌B．芽孢可以度过不良环境C．芽孢是细菌用来繁殖的结构D．芽孢是细菌的休眠体