已知函数的图像不经过第四象限,则实数的取值范围是______. 答案:【答案】【解析】根据函数的图像不经过第四象限得到,解不等式求得的取值范围.由于函数的图像不经过第四象限,所以,即,所以.故填:. –What ___ the number of the students in your school? –About two thousand. A number of them_____ from England. A. is; are B. is; is C. are; is D. are; are