问题 单项选择题

项目经理正在努力协调所有活动,确定如下信息:活动1可以马上开工,估计活动工期为1周;活动2在活动1完成后开始,估计活动工期为4周;活动3在活动2结束后开始,估计活动工期为5周;活动4在活动1结束后开始,估计活动工期为8周。活动3和活动4必须在项目结束前完成。项目的关键路径是多少?()

A.10

B.11

C.14

D.8

答案

参考答案:A

解析:A.10B.11C.14D.8

完形填空

There are many ways for us to reduce (减少) waste. For example, we can reuse paper and plastic bags. We can also recycle newspapers, glass, and cans (易拉罐)      1    new things. Here are some useful      2     to reduce waste.
Write on both sides of paper
Many people write on only one side of their paper. Why not try using both sides? Some students only use half the pages of their      3    before getting new ones. Try to use up all the paper. People often give cards on birthdays or festivals. How about trying to     4      e-cards (电子贺卡) instead?
Don’t throw away your old batteries (电池)
Maybe you do not know that old batteries make the soil      5     . This is because they have poisonous (有毒的) parts in      6     . So, don’t throw away batteries.     7    them together. Try to use rechargeable (充电的) batteries for your games and CD players.
Give     8    all your unwanted clothes
There are many poor families in China. You may ask your mother to keep your unwanted clothes. Then you can pass them on to those poor children. You will feel happy that you are      9    someone else. Also, you can see       10    your friends or relatives (亲戚) want them before throwing them away.
小题1:
A.makeB.to makeC.makingD.be made
小题2:
A.plansB.helpsC.waysD.things
小题3:
A.exercisesB.schoolbagsC.notebooksD.papers
小题4:
A.sendB.buyC.receiveD.waste
小题5:
A.dryB.richC.cleanD.dirty
小题6:
A.thoseB.itC.themD.much
小题7:
A.ThrowB.KeepC.TryD.Lose
小题8:
A.away B.inC.offD.up
小题9:
A.helpingB.givingC.enjoyingD.interesting
小题10:
A.unlessB.ifC.thoughD.but
单项选择题