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【单选题】New Technique Promises Earlier Cancer Detection A new technique could revolutionize the early detection of cancer, giving sufferers a greater chance of beating the disease, American scientists said. R...
A.
before
B.
after
C.
although
D.
near
【单选题】最概然速率Vp的物理意义是( )。
A.
Vp是速率分布中最大速率
B.
Vp是大多数分子的速率
C.
在一定的温度下，速率与Vp相近的气体分子所占的百分率最大
D.
Vp是所有分子速率的平均值