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【单选题】
已知某土d 10 =0.02mm，d 30 =0.25mm，d 60 =0.35mm，则该土的不均匀系数为( )。A.
25
B.
17.5
C.
20
D.
15
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【简答题】Ese anillo ya no _____ llevo puesto.
【简答题】已知： ，则m=___________。
【单选题】Volts from the Sky Lightning has caused awe and wonder since old times. Although Benjamin Franklin demonstrated lightning as an enormous electrical discharge more than 200 years ago, many puzzles stil...
A.
Cloud-to-ground lightening occurring in the US
B.
Types of lightening
C.
Cause of lightening
D.
Differences between thunder and thunderstorm
E.
Frequencies of thunderstorms occurring in the world and the US Paragraphs 2 and 3 ______.
【简答题】In earliest times, men considered lightning to be one of the great mysteries (神秘的事物) of nature. Some ancient peoples believed that lightning and thunder were the weapons (武器) of the gods. In reality, ...
【单选题】Llevo _____al hospital.
A.
a mis abuelos
B.
mis abuelos
C.
a mi abuelos
D.
a mis abuelo
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