到站发现篷布与回送清单记载的张数（包括号码）不符时，（）h内向有关部门发电报。
A.12
B.24
C.36
D.48
参考答案：B
－Have you known the exam result?
－Not yet. I guess the paper ________ by the teacher now.
A．has graded
B．is graded
C．is being graded
D．is grading
下列极限中，不正确的是（）
A.A
B.B
C.C
D.D
