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【单选题】
When a body floats in a liquid, the magnitude F b of the buoyant force on the body
A.
is smaller than the magnitude F g of the gravitational force on the body.
B.
is equal to the magnitude F g of the gravitational force on the body.
C.
is bigger than the magnitude F g of the gravitational force on the body.
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B.
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A.
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B.
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C.
254
D.
253
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A.
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B.
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C.
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【单选题】二进制数(11111110)2转换为十进制数是__________.
A.
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C.
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D.
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