被运动员踢出的足球沿如图所示的轨迹运功,足球的重为5N,在图中画出足球受重力的示意图.
过球心沿竖直向下的方向画一条带箭头的线段,并用符号G表示,大小为5N.如图所示:
______ by many well-known experts and film stars, the product was very popular at one time.
A.To advocate
B.Having advocated
C.Advocating
D.Advocated
风热咳嗽、痰热咳嗽均为适宜的药组是()。
A.前胡、浙贝母
B.瓜蒌、天竹黄
C.竹茹、桔梗
D.白前、荆芥
E.旋覆花、马兜铃