题目

单词拼写 66.A _______(广泛传播的)flu epidemic affected eighteen western states. 67. There has been serious _______(分歧) between the two political over the question. 68. He couldn’t stand terrible English ________(气候). 69. The population had ________(减少) from about 8,300,000 in 1845 to less than 6,600,000in 1851. 70. The _______(平均数)of 3, 6and 9 is 6. 71. The story ______(使兴奋)the little boy very much. 72. On hot days we often go _____(洗澡) in the river. 73. I can’t _____(评价) his ability without seeing his work. 74. I got into a _____(已知如图，在直角坐标系xOy中，点A，点B坐标分别为（﹣1，0），（0， ），连结AB，OD由△AOB绕O点顺时针旋转60°而得．（1）求点C的坐标；（2）△AOB绕点O顺时针旋转60°所扫过的面积；（3）线段AB绕点O顺时针旋转60°所扫过的面积．