【单选题】听力原文:How many pages are in the book? (A) He's six years of age. (B) All the pages are white. (C) There are about three hundred pages. (36)
【单选题】How many countries are listed where the compulsory school age is 7 excluded The U.S. A?
【判断题】( )客房服务员领取楼层钥匙卡之后,如工程部、送餐部等其他同事使用可暂借他们。
【简答题】把2x-y=3写成y是x的函数的形式为______.
【判断题】客房服务员领取楼层钥匙卡之后,如工程部、送餐部等其他同事使用可暂借给他们。
【单选题】Of people 20 years of age or older, approximately how many more males than females were unem-ployed in 1997?
【单选题】How many runners aged 5 to 85 are attracted each year to the Sunday Times Fun Run in Hyde Park.
【简答题】. 已知函数 ,其中 , (1)当 时,把函数 写成分段函数的形式; (2)当 时,求 在区间[1,3]上的最值; (3)设 ,函数 在(m,n)上既有最大值又有最小值,请分别求出m,n的取值范围 (用 表示).