(2010·黑龙江哈三中高三10月月考) 30. By the end of 2008, about half a million people had flooded into the city, _____ up around 10 percent of its total population. A. make B. made C. making D. to be made 答案:C如图是2008年10月份的日历,如果用表示类似灰色矩形框中的4个数,试用等式写出a,b,c,d之间的数字关系:________.(答案不唯一)