在ADM网络图中,有时为了表示逻辑关系,需要设置一个虚活动,虚活动是不需要时间和资源的,一般用()表示。
参考答案:虚箭线
根据所给提示,完成句子。
1. The Grand Budda in Leshan is 71 meters high. (划线部分提问)
_____ _____ is the Gand Budda in Leshan?
2. Let's save every drop of water. (反意疑问句)
Let's save every drop of water, _____ _____?
3. Money is important, Knowledge is more important. (合并为一句)
Knowledge is _____ important _____ money.
4. I used to swim in the river near my home. (改为一般疑问句)
_____ you _____ to swim in the river near your home?
5. 妈妈经常劝爸爸戒烟。
Mum often asks Dad to _____ _____ smoking.
由孔、轴上下偏差两条直线组成的一个区域称为()
A、公差带
B、公差表
C、公差图
D、公差