The Jurassic Park is _____ Steven Spielberg movie in which _____ hero fights bravely and protects his friends and family from dinosaurs.
A:/; the
B:a; the
C:/; a
D:the; a
我国的领海是指从海岸线基线向海上延伸到多远的海域?( )
﹣21a2b3c÷3ab=____.
“北宋时,有人在黏土制成的一个个小方块上刻单字,再用火烧成单字。排版时,把陶子放在一个铁框里,排满为一版;印刷时可以同时排版,效率很高。印完一板以后,陶子拆下还可以再用。”这里介绍的是( )