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【多选题】
钢铁生锈过程发生如下反应：①2Fe+O 2 +2H 2 O=2Fe（OH） 2 ；②4Fe（OH） 2 +O 2 +2H 2 O=4Fe（OH） 3 ；③2Fe（OH） 3 =Fe 2 O 3 +3H 2 O．下列说法正确的是（ ）A.
反应①、②中电子转移数目相等
B.
反应①、②中氧化剂是氧气
C.
①、②都属于电化学腐蚀
D.
①属于吸氧腐蚀
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【单选题】回答（48）题 查看材料
A.
It's easier to have a robot companion instead of a human friend.
B.
But a sophisticated robot will probably be even more attractive.
C.
And if you want to go ahead and tie the knot with your special electronic friend， Levy said that such marriages will be socially acceptable by around 2050.
D.
However， few owners will program their robots to point out their flaws.
E.
Maybe your generation could resist， but eventually there will be a generation of people who grow up with humanoid robots as a normal part of life.
F.
The robot knew each child because it was programmed with face and voice recognition.
【单选题】Which of the following is nearest to Peter Bentley’s view on the winged robot?
A.
the winged robot could never really by
B.
the winged robot did not have a motor
C.
the winged robot should go through further evolution before it could fly
D.
the robot could by if it were lighter
【单选题】-What's that? -________________ [ ]
A.
It's very beautiful.
B.
It's a robot.
C.
Yes, it is.
【单选题】Technology helps to reduce the time delay _____ a doctor's order to the robot and the robot's actions.
A.
for
B.
at
C.
between
D.
from
【单选题】Mr. Su’s robot has caught a virus. He’s complaining ______ the shop_______ the robot.
A.
about, about
B.
about, to
C.
to, to
D.
to, about
【单选题】With ____ science and technology developing rapidly, it's likely that the robot will take _____ place of human beings in many ways. [ ]
A.
不填；不填
B.
the;a
C.
不填；the
D.
the;the
【单选题】关于凯氏定氮法描述不正确的是( )
A.
不会用到蛋白质系数
B.
样品中的有机氮转化为氨与硫酸结合成硫酸铵
C.
样品中的有机氮转化为氨与硫酸结合成硫酸铵
D.
加碱蒸馏,使氨蒸出
E.
硼酸作为吸收剂
F.
样品中的有机氮转化为氨与硫酸结合成硫酸铵
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