英語(yǔ)：If you dream of becoming a spaceman when you g____ up ,get started now!A spaceman n_____ a strong body and keen mind .You still have a long way to g_____ .Do you know what Shenzhou VI spaceman are able to do?Shenzhou VI spaceman are able to l______ upside down .They do this not just during s______,but also when eating and going to the toilet.Before f____ into space,they had lots of p____.Echn upside-down training l____ for many days.They also have to know every part of the spaceship and how it w_____.If something g____ wrong,they must know how to repair it.
1、ABCD和APQR都是平行四邊形,P、Q、R分別在AB、AC、AD上,AP=2QC,S四邊形ABCD=36,則S四邊形APQR=
A20 B24 C16 D18
2、已知a:b=c:d,則a²+c²和b²+d²的比例中項(xiàng)是
A、ac+bd B、ad+bc C、ad+cb D、ad+cd