下列表述，能够最科学且直观地证明地球是个球体的是（　　）

近年来,我国政府把实行科学民主决策、推进依法行政、加强行政监督作为政府工作的三项基本准则。从行政监督体系看,对国务院具有外部监督职能的中央国家机关是（  ）

某几何体的三视图如图所示，则该几何体的表面积为(　　)

    My name is Dennis. I'm a worker(工人) of a big store. I don't work in the morning. I work at night. Every morning I come home at about 6:30. I have breakfast at 7:00. After breakfast I go to bed. I get up at around 2:30. I have lunch at 2:45 and dinner at 7:40. Then I go to work at 8:30. My work starts at 9:00. I look after(照看) the store every night. I like my work very much.