搜题请搜索小程序“爱下问搜题”
问题 单项选择题

工程网络计划工期优化过程中，首先应选择压缩持续时间的工作是（）的关键工作。

A、缩短时间对质量和安全影响不大

B、工程变更程序相对简单

C、资源消耗比较均衡

D、直接成本最小

答案

参考答案：A

选择题

下列关于有性生殖和无性生殖的说法，不正确的是（　　）

A．试管婴儿技术通过有性生殖实现

B．进行无性生殖的植物不能产生生殖细胞

C．马铃薯块茎繁殖属于无性生殖

D．草莓匍匐茎上长出新个体属于无性生殖
查看答案
补全对话，情景问答
根据对话内容及方框中说给的句子补全对话， 其中有一项是多余的。
A. They were expensive.                        B. That sounds serious.
C. I feel terrible about something.           D. Can you mend them?
E. You are really helpful.                        F. But I didn't have enough money to
May: What's up? You look really unhappy.
Kate: Yes. I   1   
May: Tell me about it.  Maybe I can help.
Kate: Well, I needed some new shoes to wear to a party.   2   So I asked my sister if I could wear her
new shoes.     
May: That was nice of her.
Kate: No, you see, that's the problem. She refused to let me wear them because she wants to keep them
new for her 16th birthday party.  3   She saved up a lot of money tobuy them, and she's really proud of
them.  But I took them when she was out, and I worethem to the party.  And on my way home,I fell, and
one of the shoes is broken now.
May:   4  .
Kate: No, I don't think anyone will be able to do that.
May:   5  .But if you aren't honest, she'll be even angrier with you.Kate: I know you are right.   
查看答案