题目

一条鱼的鱼尾重2千克,鱼头的重量等于鱼尾的重量加上鱼身重量的和的一半,而鱼身的重量等于鱼头和鱼尾重量的和,鱼的重量是多少? 答案:解:因为鱼头的重量=12(鱼尾的重量+鱼身重量) (1);鱼身的重量=鱼头的重量+鱼尾重量 (2),将(1)代入(2)中,鱼身的重量=12(鱼尾的重量+鱼身重量)+鱼尾重量 (3);设鱼身的重量为x千克,把鱼身重量x千克及鱼尾重2千克代入(3)式,x=12(2+x)+2,2x=2+x+4,x=6,鱼头的重量:6﹣2=4(千克) 单词拼写     据下列句子所给汉语注释,在横线上写出空缺处各单词的正确形式。(每空只写一词)1. In the 1970s, may people in China          (仍然)poor, living a hard life.2. He was greatly          (荣幸)to be invited to give a lecture at the meeting.3. I like to go outing in autumn, especially in         (八月).4.       (幸好),he escaped the bad accident yesterday.5.Please put the        (窗帘)of the two windows down to prevent the sunlight coming in.6.Sorry,the question you asked me was        (超出)me.7.You will be      (惩罚)for your fault in the task.8.I couldn't understand the         (解释)you gave me yesterday.9.The professor       (提到)to at the meeting was from Canada.10.Everyone is        (好奇)about what he has done.
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