题目

It is requested that every student             (求助于)the dictionary while having difficulty in reading.(turn) 答案：（should ）turn to 解析: 词组turn to意为向某人求助 【标签】动词词组与其他物质生产部门相比，农业生产具有的特点是A.地域性B.连续性C.均衡性D.季节性和周期性