A:absurd
B:novel
C:wealthy
D:adequate
给划线的字选择正确的读音
环绕____(rào rǎo) 仪式____(sì shì)
庄严____(yán yuán) 粮____(láng liáng)食
吸引____(yín yǐn) 苍____(cāng chāng)茫
如图1,在直角梯形ABCD中,∠ADC=90°,CD∥AB,AB=4,AD=CD=2.将△ADC沿AC折起,使平面ADC⊥平面ABC,得到几何体D﹣ABC,如图2所示.