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【单选题】
What was Cunningham's first job?A.
A hat maker.
B.
A photographer.
C.
A fashion writer.
D.
An anthropologist.
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举一反三
【简答题】以下哪一项明显违反了“勤勉尽职”的要求?（ ）
【单选题】At which lay er of the OSI model does the Spanning Tree Protocol (STP) operate at（）
A.
Lay er 5
B.
Lay er 4
C.
Lay er 3
D.
Lay er 2
E.
Lay er 1
【单选题】The Solo Trek is able to lift off the ground by using ______ .
A.
a solar powered engine
B.
engine-powered twin fans
C.
large flapping wings
D.
rotating blades
【单选题】What is the meaning of "Solar Powered"
A.
Has many functions,
B.
Water does not cause a problem,
C.
Gets power from the sun,
D.
You can use wifi with this product.
【简答题】下列明显违反了“勤勉尽职”的要求的是（ ）
【单选题】Why does Culhane say the solar- powered waters heaters demonstrate that "renewable energy is not some exotic technology"?
A.
The solar-powered heaters are expensive and difficult to make.
B.
The solar-powered heaters can decrease potential energy costs.
C.
The solar-powered heaters can be built simply with found materials.
【单选题】A solar car is an electric car powered by ______ electricity.
A.
sun
B.
hydrogen
C.
pure
D.
solar
【简答题】以下哪一项明显违反了“勤勉尽职”的要求?（ ）
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