先想一想，商比被除数大，还是商比被除数小，然后再计算．
能证明淀粉部分水解成葡萄糖的试剂是（ ）
北魏孝文帝改革的措施中有利于其直接控制黄河流域的是
— Lily, look, a crowd of birds are flying to our small yard.
— Just now, I threw some bread in the yard. They have come here for the food.
