题目

I think you can help ____________ a donation or doing some voluntary work.A．to makeB．by makingC．for makingD．with making 答案：B解析:略在原始地球条件下，下列哪项的形成是生命发生的开端？（　　）A．无机小分子B．微小生物C．细胞D．有机小分子