皮皮学，免费搜题
登录
搜题
【单选题】
双代号网络图的绘制应遵循的规则:( )A.
严禁箭线交叉
B.
只允许有一个起点节点，必须有一个终点节点
C.
必须有一个终点节点
D.
严禁出现无箭头连线和严禁出现无箭头节点的箭线
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【单选题】If he _________ here now, he would be doing everything he could to help you.
A.
were
B.
is
C.
will be
D.
be
【单选题】-30. If he—— here now, he would be doing everything he could to help you.
A.
were
B.
is
C.
will be
D.
be
【单选题】Hasn’t he arrived yet? He is ______ to be here at 8. Now it is 8:30.
A.
regarded
B.
supposed
C.
considered
D.
known
【单选题】Why are weather-boarded houses painted white according to the passage?
A.
To contrast with the colored window-frames and doors.
B.
As a break with the traditional coloring.
C.
Because this is the tradition.
D.
To cover the original tarred surface.
相关题目：
参考解析：
知识点：
题目纠错 0
发布
