皮皮学，免费搜题
登录
搜题
【单选题】
直线ax+by+c=0同时要经过第一、二、四象限，则a，b，c应满足（ ）A.
ab＞0，bc＜0
B.
ab＜0，bc＞0
C.
ab＞0，bc＞0
D.
ab＜0，bc＜0
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】As well as being air-conditioned, the long-distance buses in our company offer comfortable seats and toilets.
【判断题】Long-distance buses are economical, but slower modes of public transportation. There are many bus companies, among which Greyhound, Trailways, and Peter Pan are the major ones. Question : Long-distanc...
A.
正确
B.
错误
【单选题】______ being air-conditioned, the long-distance buses in our company offer comfortable seats and toilets.
A.
For
B.
As well as
C.
Because
【简答题】public buses.wmv What have been installed in long-distance bus stations?
【单选题】Why will battery buses cost less than conventional buses in the long run?
A.
They will spread the capital cost over a long period
B.
They will be stronger and last longer.
C.
They will use less fuel and cost less to maintain.
D.
They will be charged at night when electricity costs less.
相关题目：