再试试手气
主机名：localhost，登陆名：root，登陆密码：11111111，用户数据库：books，数据库的正确连接命令是：（ ）
A
@$db=new myslq("localhost","root","11111111","books");
B
@$db=new wysqli("localhost","root","11111111","books");
C
@$db=new mysqli("localhost""root""11111111""books");
D
@$db=new mysqli("localhost","root","11111111","books");
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