气溶胶中粒径（）μm的颗粒，称为飘尘。
A.>10
B.<5
C.>15
D.<10
参考答案：D
----Will you tell the secret to the teacher? --- No! ____ asked to.
A．Even if
B．Even as
C．Even so
D．If
中央储备粮的用途是什么？
