下列动物中,属于脊椎动物的是( )
A.虾
B.珊瑚虫
C.鲨鱼
D.乌贼
鲨鱼属于脊椎动物,体内有有脊椎骨组成的脊柱,虾、珊瑚虫、乌贼等属于无脊椎动物,体内没有脊椎骨组成的脊柱.
故选:C
.
We often talk a great deal about English language teaching, _____ that it is the learning that really matters.
A.having forgotten
B.forgotten
C.forgetting
D.to have forgotten
______中的统一接入平台提供了多种接入方式和多种接入终端的支持。