Ifyouhavetheright___(equip)，youwon’tfindthejobdifficult.
Roundthecornerwasabuilding_____windowswereallbroken.
Studentsshould（）theirowninterestsaswellasdotheirschoolwork.
机枪每秒钟射出15颗子弹.每颗子弹质量为0.02kg，射出的速率为800m/s，则射击时的平均反冲力大小为()
thebossescannotdowithoutprofit,workershaveanedge.
