题目

若一次函数的图像不经过第二象限，则的取值范围是( )A. ＜ B. 0＜＜ C. 0≤＜ D. ＜0或＞ 答案：【答案】C【解析】根据题意知，一次函数y=（1-2k）x-k的图象经过第一、三、四象限，或过原点，则1-2k>0，且-k≤0，通过解不等式即可求得k的取值范围．∵一次函数y=(1−2k)x−k的图象不经过第二象限，∴一次函数y=(1−2k)x−k的图象经过第一、三、四象限，∴1−2k>0，且−k⩽0，解得0≤＜.故选C.语法填空根据文段意思, 用所给单词的适当形式填空, 将答案写在答卷上。Have you ever heard of Tree Shaping? It is the practice of【1】______(make) trees and other woody plants form(形成) beautiful or 【2】_______(use) shapes. There is a man in Australia and he【3】___________(have) the hobby of making plants. He was a jewelry(珠宝) maker【4】______ he was young. Then he got an orchard(果园) and he began to take care of it by 【5】______(him). 【6】_______ working with trees there, he got【7】_______ idea of making a chair with trees. Then he began to make 【8】__________ (difference) furniture. Until now, he has made chairs, 【9】________ coffee table, a garden gate and so on. The man’s hobby is unusual, 【10】____________ it really has a lot of fun.