润滑油馏分最好是初馏点到干点的范围不大于（）℃。
A.90
B.100
C.110
参考答案：B
26.Younger adults who get either little sleep or a lot of it ________ see a greater expansion in their waistlines over time.
A. may B. must D. need D. Shall
牙列缺失的患者所出现的软组织改变中，不包括
A．唇颊系带与牙槽嵴顶的距离变短B．口角下陷C．牙槽黏膜增厚D．口腔内唾液量减少E．味觉异常
