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【多选题】
In a business letter, which dates are correct?A.
March 1, 2010
B.
1 March 2010
C.
1st March 2010
D.
March 1st, 2010
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【多选题】乘坐公共汽车和地铁列车时应遵守哪些礼节、礼貌?
A.
排队候车，先下后上。
B.
让妇女、老人、小孩和残疾人先上车。
C.
注意安全，扶好、坐好。
D.
不要将身体伸到车厢外，或随意动车厢里的设施。
【单选题】原水中投加铝盐混凝剂形成大量氢氧化铝沉淀物,沉淀物直接吸附水中细小胶体颗粒,从而形成大的絮体,这种混凝的主要机理为下列何项?
A.
)压缩双电层
B.
)吸附电中和
C.
)吸附架桥
D.
)沉淀物网捕
【单选题】Man: What do you think you will do in the year 2020? Woman: 2020? Well, I think Ill probably be in a spaceship on my way to the planet Mars. Question: Which of the following is true according to the s...
A.
Man will probably be living on the planet of Mars.
B.
Spaceships will probably be able to reach the Mars.
C.
Many people on Earth will travel to other planets.
D.
We will discover some kinds of being on the Mars.
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