下列选项中，不属于交通标志的是( )。
A．警告标志
B．禁令标志
C．指路标志
D．交通标线
参考答案：D
．----Why is the university doing so much building?
----______number of students______so rapidly.
A．The;have increased
B．A;have increased
C．The;has increased
D．A; has increased
简述中小学教育科研的实施过程。
