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【单选题】
按酸碱质子理论,Na2HPO4是A.
中性物质
B.
酸性物质
C.
碱性物质
D.
两性物质
E.
以上均不是
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反馈参考答案：
举一反三
【单选题】— ____________________ — Sure, here you are. [ ]
A.
May I have a look?
B.
What colour is it?
C.
What's in it?
【单选题】—You look sad. What's the matter? —Look at my terrible haircut. _____ [ ]
A.
I can't stand it.
B.
I like it.
C.
Do you like it?
D.
Would you mind it?
【多选题】下列 [ ] 属于中国民航局颁发的《 民用无人驾驶航空器实名制登记管理规定 》中定义的 “ 民用无人机 ” 类型
A.
大疆多旋翼飞行器
B.
个人 DIY 组装的起飞重量超过 250 克的 4 旋翼飞行器
C.
起飞重量 250 克以上的航空模型飞机
D.
无人驾驶系留气球
【单选题】The popularity which was accorded The Virginian indicates that Wister ______.
A.
realized his stated ambition
B.
gave us an authentic account of the western experience
C.
became the American Tolstoi
D.
had written an account of the cowboy which appealed to American aspirations
【简答题】当实际期指低于无套利区间的下界时，以下操作能够获利的是（ ）。
【单选题】Which of the following phrases in the fifth paragraph indicates the fridge's negative effect on the environment?
A.
Hum continuously
B.
Climatically almost unnecessary
C.
Artificially-cooled space
D.
With mild temperatures
【单选题】Which of the followings best indicates the total quantity of cargo the vessel loaded? ( )
A.
Net tonnage
B.
registered tonnage
C.
Gross tonnage
D.
Deadweight
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