My grandmother was always encouraging me to set goals and work hard to achieve them. She would tell me not to be a follower and not to set 41 on what I could achieve. She 42 believed th
Pet owners are being encouraged to take their animals to work , a move scientists say can be good for productivity , workplace morale (士气), and the well-being of animals .A study found that 25% of
(2)
(3) ①增加重物的重力 ②减轻动滑轮的重力解析:
