题目

小李种的庄稼生长不茂盛，叶子偏黄，籽粒不饱满。他应该施加的复合肥是()   A. CO(NH2)2             B.K2SO4                       C. Ca3(PO4)2                D. NH4H2PO4 答案：D— What should I do with this passage?—________ the main idea of each paragraph. A．Finding outB．Found outC．Find outD．To find out