标准体型的代号（）
A、Y
B、A
C、B
D、C
参考答案：B
The boy sitting by the window is the only one of the students who from the countryside in our school.
A．are
B．is
C．were
D．was
下面哪个域不会是域abc.com的子域？（）
A.abc.net
B.abc1.com
C.aaa.abc.net
D.aaa.abc.com
