设集合A={{a}},B={{a},Φ},则A∩B= (51) 。
A.{{a}}
B.{a}
C.Φ
D.{{a}, Φ}
参考答案:A
我会给下列句子加标点。
1.□你敢碰我吗□陶罐子□铁罐傲慢地问□
□不敢□铁罐兄弟□陶罐谦虚地回答□
2.□何必这样说呢□陶罐说□我们还是和睦相处吧□有什么可吵的呢□
The chairman requested that ___________.
A.the members studied the problem more carefully
B.the problems were more carefully studied
C.the problems could be studied with more care
D.the members study the problem more carefully