Last month, thousands of workers in that city went on _____ strike, demanding lower taxes and ______ end to cutting staff members. A. a; the B. a; an C. 不填; an D. 不填; the 答案:C足球运动员已将足球踢向空中,如图所示,下列描述足球在向斜上方飞行过程中某时刻的受力图中,正确的是(G为重力,F为脚对球的作用力,Ff为空气阻力)( )
A、B、C、D、