题目

 在中，共有             个无理数.  答案：1967解析:略 2、1．If you ________（忽视）your diet, trouble will follow． 2．She was still _______（为…烦恼）about the argument she had with Harry． 3．The lecture ________（系列）falls naturally into three parts． 4．She received several __________ （官方的） letters this morning． 5．My father has a good __________（掌握，精通）of the computer． 6．You are r________ not to smoke in the meeting room． 7．I p________ up all my books into boxes． 8．That professor has s________ from cancer for almost one year． 9．He went to the USA with the p_________ of further study． 10．After returning from abroad, they s________ in Shanghai．