某分部工程双代号网络图如下图所示,其作图错误表现为( )。
A.有多个起点节点
B.有多个终点节点
C.节点编号有误
D.存在循环回路
E.有多余虚工作
参考答案:A,C,E
比x的6倍多5的数是( )。
根据下面对话中的情景,在空白处填入恰当的句子,使对话内容完整。
Clerk : 1______?
Mary: Yes, please.1 want some clothes. Do you have black pants?
Clerk: 2______.We have black, red and blue pants. Do you like them?
Mary: Yes,I do. 3______?
Clerk: They are 35 dollars.
Mary: I'll take the black ones.
Clerk: OK. 4______.
Mary: Thank you very much.
Clerk: 5______.