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【单选题】
「さくぶんは もう 出しましたか。」 「いいえ、まだ ____。」A.
書きました
B.
書かないでした
C.
書いていません
D.
書きませんでした
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举一反三
【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.
【简答题】阅读理解。 A Solar-powered Plane-Lowcarbon Earlier this month, a solar-powered (太阳能动力的) plane called Lowcarbon took off to the sky for the first time. It has passed an important test on the way to travel a...
【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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