英语：Ifyoudreamofbecomingaspacemanwhenyoug____up,getstartednow!Aspacemann_____astrongbodyandkeenmind.Youstillhavealongwaytog_____.DoyouknowwhatShenzhouVIspacemanareabletodo?ShenzhouVIspacemanareableto

　　英语：Ifyoudreamofbecomingaspacemanwhenyoug____up,getstartednow!Aspacemann_____astrongbodyandkeenmind.Youstillhavealongwaytog_____.DoyouknowwhatShenzhouVIspacemanareabletodo?ShenzhouVIspacemanareabletol______upsidedown.Theydothisnotjustdurings______,butalsowheneatingandgoingtothetoilet.Beforef____intospace,theyhadlotsofp____.Echnupside-downtrainingl____formanydays.Theyalsohavetoknoweverypartofthespaceshipandhowitw_____.Ifsomethingg____wrong,theymustknowhowtorepairit.

　　1、ABCD和APQR都是平行四边形,P、Q、R分别在AB、AC、AD上,AP=2QC,S四边形ABCD=36,则S四边形APQR=

　　A20B24C16D18

　　2、已知a:b=c:d,则a²+c²和b²+d²的比例中项是

　　A、ac+bdB、ad+bcC、ad+cbD、ad+cd