如图所示，用100 N的力将50 N重的物体A压在竖直墙壁占上，物体沿墙壁向下匀速滑行了0.5 m，则重力做的功是 J，压力做的功为 J．
25; 0
_____ so delicious, the food in the market was sold out soon. [ ]
A. Tasting
B. tasted
C. Having been tasted
D. Being tasted
上唇皮肤瘙痒，有多个水疱并有强烈的不适感，可能的诊断是
A．唇疱疹B．复发性阿弗他溃疡C．疱疹性龈口炎D．雪口病E．手足口病
