He ________ not to throw away the food, but he still did it.
A:asked
B:asks
C:was asked
分类是学习和研究化学的常用方法,下列物质分类正确的是( )
已知集合A=x|xx-1=0,那么下列结论正确的是( )
下图为30°S附近沿海某地等高线地形图和地层示意图,R河流正值汛期。此季节,该地区( )