水族馆有大金鱼160尾,小金鱼的尾数是大金鱼的20倍,一共有金角多少尾?
160×(20+1),
=160×21,
=3360(尾).
答:一共有金鱼3360尾.
下列动物中体内有脊柱的是( )
①家兔,②对虾,③鲤鱼,④蚯蚓,⑤青蛙,⑥蝗虫
A.①②④⑤
B.①③⑤
C.①②⑤⑥
D.①②④⑥
4. He is _____, but he doesn't feel _____. Because he likes to surf the Internet for his study of English.
A.lonely; alone
B.alone; lonely
C.alone; alone
D.lonely; lonely