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
