对同一原因经()次投递仍未投出而改为局内投交的给据邮件,应在投递邮件清单相关歉收栏内批注“局内投交”字样。
A、一
B、二
C、三
D、四
参考答案:B
屋面涂膜防水层的平均厚度应符合设计要求,最小厚度不应小于设计厚度的( )。
A.75%
B.80%
C.85%
D.90%
He ________ a doctor when he ________ up. [ ]
A. is, grow
B. is going to be, grow
C. is going to be, grows
D. is, growing