Q热在动物间的传播媒介是（）
A.蜱
B.虱
C.蚊
D.蚤
E.螨
参考答案：A
I was so occupied last year that I could hardly find any occasion _____ I stayed with my kids around
at home. [ ]
A. who
B. which
C. why
D. when
用一个平面去截一个几何体,得到的截面是圆面,这个几何体不可能是
A．圆锥
B．圆柱
C．球
D．棱柱
