A:经营权
B:所有权
C:债权
D:使用权
①水 ②土壤 ③阳光 ④空气 ⑤人 ⑥玉米螟 ⑦杂草 ⑧其他玉米.
已知:如图,在△ABC中,∠ACB=90°,CD⊥AB,垂足是D,BC=6,BD=1.求AD=____
The dictionary is ______: many words have been added to the language since it was published.