内圈固定比外圈固定的滾动轴承在相同转速下，滾珠绕轴承轴线转动的回转数小。
参考答案：对
No. 1 Middle School of Anxiang is the very place ______ Song Zhenyu, the Provincial science top of Hunan in 2014, was studying.
A．that
B．which
C．where
D．from which
胰腺癌首选无创性检查方法是（）。
A.超声检查
B.X线钡餐造影
C.CT
D.MRI
E.肿瘤标记物CA199
