二型观测线基牙的倒凹区在
A.近缺隙侧B.远缺隙侧C.颊侧D.舌侧E.近、远缺隙侧倒凹区都大
参考答案:A
下列关于青蛙的叙述不正确的是( )
A.幼体的呼吸器官是鳃
B.成体的呼吸器官是鳃和皮肤
C.幼体先长出后肢,再长出前肢
D.其受精卵一定要在水中孵化
— Our holiday cost a lot of money.
— Did it? Well, that doesn't matter______you enjoyed yourselves. [ ]
A. as long as
B. unless
C. as soon as
D. though