题目: The companies are working together to create _____ they hope will be the best means of transport in the 21st century. [ ]A. which B. that C. what D. who 答案: 答案:C
题型:选择题 The problem is ______difficult that I can't work it out. [ ]A. so B. such C. so a D. such a 查看答案
题型:填空题 设有如下关系表R: R(NO,NAME,SEX,AGE,CLASS) 主关键字是NO。 其中NO为学号,NAME为姓名,SEX为性别,AGE为年龄,CLASS为班号。写出实 现下列功能的SQL语句。 删除姓“王”的学生记录______ 查看答案