滑动轴承按润滑类型分为（）润滑轴承和液体润滑轴承两大类。
参考答案：不完全
能够检测到胰岛素的部位是（ ）
A．胰动脉
B．胰静脉
C．胰管
D．十二指肠
One day a car rental agency rented 2/3 of its cars, including 3/5 of its cars with CD players. If 3/4 of its cars have CD players, what percent of the cars that were not rented had CD players ？（）
A. 10%
B. 35%
C. 45%
D. 66.7%
E. 90%
