— Mom, I found that my book open on Jack's desk last night.
— Really? I couldn't believe that he to me yesterday.
A:lay; lie
B:lie; lied
C:lied; lied
D:lay; lied
①企业资产负债率下降,利润提高
②主要元器件供不应求,价格升高
③该行业大范围使用机器人生产,增产增效
④受人民币贬值影响,进口零配件成本升高
如图所示,重为100N的物体A在水平拉力F的作用下,沿水平面以0.4m/s的速度作匀速直线运动,弹簧测力计的示数为5N。不计滑轮、绳子、弹簧测力计的重力,忽略绳子与滑轮间的摩擦。则 ()