题目

从方框中选择恰当的并列连词填空, 每词限用一次。but, while, and, or (1) Your article is interesting your handwriting is beautiful. (2) Math isn’t easy, I like it. (3) I like reading, my brother likes writing. (4) Save water, there will be only the last drop of water left on earth. 答案:【1】and 【1】but 【1】while 【1】or4.下列各种现象中,属于条件反射的是(  )A.叩击膝下韧带,小腿突然跳起B.沸水烫手,立即缩回C.预备铃响,走进教室D.强光刺眼,瞬间闭目
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