图中四个省级行政区域的汽车牌照的第一个字依次为( )
A:①苏 ②桂 ③皖 ④黑
B:①云 ②黑 ③鄂 ④粤
C:①青 ②粤 ③渝 ④新
D:①新 ②云 ③豫 ④鲁
(Ⅰ)求证:FG∥平面PBD;
(Ⅱ)求证:BD⊥FG.
下列有关生物多样性及保护的说法,正确的是( )
—You are relaxing yourself here?
—Yes. It feels ____ to walk slowly along the river.