题目

下列做法中，不正确的是 A．用燃烧法识别羊毛和合成纤维 B．用甲醛溶液浸泡海产品进行保鲜C．保护金属资源的有效途径之一是将废旧金属回收 D．解决水污染的有效途径之一是农业上合理施用化肥和农药 答案：BThe year I went away to college was a very difficult transition（过渡期）for me.   1   is probably true with many people．I got quite homesick and   2   thought about going home. Although the   3   time for many students is getting   4   from home, my mailbox was frequently   2   . One day when I went to the mailbox, there was a postcard   6   out at me．I sat down to read it,   7   a note from someone back home.  8   I became increasingly puzzled as   9   postcard were like this: It was a full news report about a woman named Mabel and her newborn baby. I took the card back to my room and   10   about it. Several days later I   11   another postcard, this one  12   news about Maybe line, Mabel’s cousin. Soon after, another card arrived and then another,   13   full of news of different people. I began to   14   look forward to the next one, 15 to see what this author would come up with 16   . I was never  17   . Finally, the cards   18   coming, right about the time I had begun to feel   19   about college life. They had been such a happy distraction （调剂） that, I have 20  all the postcards and still bring them out to read whenever I need a life. 1．A．If                        B．So                      C．As                     D．What 2．A．often                    B．carefully             C．seldom               D．merely 3．A．hard                     B．last                     C．busiest               D．happiest 4．A．visitors                 B．letters                 C．calls                   D．directions 5．A．empty                  B．full                     C．closed                D．open 6．A．pouring                 B．reaching             C．staring                D．rolling 7．A．describing             B．considering          C．enjoying             D．expecting 8．A．But                      B．Thus                  C．Also                   D．Even 9．A．any                      B．no                      C．some                  D．such 10．A．joked                  B．talked                 C．forgot                D．cared 11．A．mailed                B．accepted             C．wrote                 D．received 12．A．delivering            B．demanding          C．discovering         D．developing 13．A．one                    B．each                   C．either                 D．both 14．A．hardly                B．possibly              C．usually               D．really 15．A．promising           B．surprised            C．interested            D．pretending 16．A．below                 B．lately                  C．next                   D．behind 17．A．frightened           B．disappointed        C．excited               D．pleased 18．A．continued            B．stopped              C．started                D．avoided 19．A．easy                   B．safe                    C．tired                   D．anxious 20．A．lost                     B．collected       C．torn                     D．saved