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【多选题】
绘制网络图时，需注意下列事项A.
不允许出现循环线路。是有向图，从左到右，不应有回路
B.
箭头必须从一个节点开始，到另一个节点结束
C.
两个节点之间只能画出一条线，但进入某一节点的线可以有很多线
D.
每个网络图至少有一个网络始点事件，不能出现没有先行作业或没有后续作业的中间事件
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举一反三
【简答题】写句子。 1. My birthday is in _______________ . 2. My mom's birthday is in___________. 3. My dad's birthday is in____________. 4. My best friend's birthday is in _____________.
【单选题】It can be inferred from the passage that earlier generations didn't realize______.
A.
the interdependence of water, soil, and living things
B.
the importance of the proper land use
C.
the harmfulness of soil destruction and river floods
D.
the extraordinary rapid growth of population
【简答题】按照实际情况填空。 1. My birthday is in ______________. 2. My mom's birthday is in ______________. 3. My dad's birthday is in ______________. 4. My best friend's birthday is in ______________.
【单选题】Last Sunday was my birthday. My mother bought _______ iPhone4 as _______ birthday present for me.
A.
a; a
B.
an; a
C.
a; an
D.
an; an
【简答题】Passage 3 If you didn’t know any better, you might think that Star, Snuppy, CC and ANDi were just a bunch of interesting names. You’d only be half right. These creative names _1_ belong to a pig，a dog...
【单选题】— This Saturday is my birthday. Can you come to my birthday party? — . When does it start? [ ]
A.
That's too bad
B.
Don't worry
C.
Sure, I'd love to
D.
Glad to help
【单选题】Which of the following is an appropriate title for this passage?
A.
Why Didn't Musicians Play on the Lusitania?
B.
Why Did Musicians Play on the Titanic?
C.
Why Didn't Passengers Panic on the Titanic?
D.
Why Did Men Smoke on the Titanic?
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