列车运行图中，黑单线黑框表示（）运行线。
A.冷藏列车
B.行包专列
C.“五定”班列
D.超限货物列车
参考答案：D
下列有关流行性出血热的叙述，错误的是（）
A.是由一种RNA病毒引起的
B.鼠类是主要传染源
C.具季节性和周期性
D.都有典型的五期经过
E.皮疹多为出血性
John doesn't sing quite _____ the other boys and girls in his class. [ ]
A. as well like
B. as good like
C. so well as
D. so good as
