The extraordinary success of Conan Dole, mainly with his Sherlock Homes, has_________ the market with detective stories.
A:flowed
B:controlled
C:charged
D:flooded
(there be,flowers,tree)
选词填空。
cough,ache,stomach,health,since
电话之间互相通话时,一般都是通过____ 来转接的,这样可以提高线路的利用率,电话通信存在____ 信号和____ 信号两种.
下列说法中,错误的有( )
①﹣2 47 是负分数;
②1.5不是整数;
③非负有理数不包括0;
④正整数、负整数统称为有理数;
⑤0是最小的有理数;
⑥3.14不是有理数.