I can't read the book by myself because there are ______________ new words in it.
A:too much
B:too many
C:much too
D:many too
下列有关生物的共同特征的叙述,正确的是( )
如图,分别以Rt△ABC的直角边AC及斜边AB向外作等边△ACD、等边△ABE.已知∠BAC=30º,EF⊥AB,垂足为F,连结DF.(1)求证:AC=EF;(2)求证:四边形ADFE是平行四边形.