题目

—We'd better not buy cups or boxes which can be used only once. —That's right. It will save energy and ________ waste. A. increase  B. reduce  C. produce   答案：B   17．甜玉米因其具有丰富的营养、甜、鲜、脆、嫩的特色而深受各阶层消费者的青睐．下列有关玉米子粒的叙述，错误的是：（　　）A．玉米子粒实际上是果实B．玉米的胚乳遇碘会变蓝C．玉米的胚只有一片子叶D．玉米的茎杆是由胚轴发育成的