不等式4-3x≥2x-6的非负整数解有( )
A.1个
B.2个
C.3个
D.4个
不等式4-3x≥2x-6,
整理得,5x≤10,
∴x≤2;
∴其非负整数解是0、1、2.
故选C.
在烈日或高温环境下运动时,过量体液丢失,体温调节发生障碍的状态就是“中暑”。
One impact that the burning of ______ fuels has had on the Earth's environment has been the increase of carbon dioxide in the earth's atmosphere.
A.vehicle
B.oil
C.gas
D.fossil