I'll go to Chongqing to work ______ a teacher.[ ]
A. on
B. at
C. like
D. as
答案:D
After the long journey, the three of them went back home, _____. [ ]
A. hungry and tiredly
B. hungry and tired
C. hungrily and tiredly
D. hungrily and tired
有关功和能,下列说法正确的是
A.功是能量转化的量度
B.功率是能量转化的量度
C.弹簧的弹力做了功,物体的重力势能减少
D.物体克服重力做了功,物体的重力势能减小