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【单选题】
自动分拣系统的任务是把不同颜色和材质的成品分别送到指定的位置，是由（）里的光栅检测技术实现的。A.
（ A ）旋转编码器
B.
（ B ）光电传感器
C.
（ C ）磁性开关
D.
（ D ）电感传感器
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举一反三
【单选题】Why did the government use comics during the war?
A.
To increase the adult market for comics.
B.
To encourage sales of a domestic product.
C.
To enhance the confidence of the troops.
D.
To try to develop a better form. of entertainment for the troops.
【单选题】(Despite of) diligent effort to promote domestic production during the war years, the Continental Army (had to rely) primarily on (captures) and imports for (much) of its military hardware and even fo...
A.
Despite of
B.
had to rely
C.
captures
D.
much
【单选题】The methods of communication used during the war were primitive
A.
reliable
B.
effective
C.
simple
D.
alternative
【单选题】What kind of food had the narrator certainly not tasted during the war ? 查看材料
A.
Bread．
B.
Butter.
C.
Ice cream.
D.
Bones.
【单选题】Fanning was made more difficult during the war because of drought and the scarcity of labor.
A.
Y
B.
N
C.
NG
【简答题】Who helped the Olympians during the war?
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