夏朝和商朝的灭亡相似之处都是 [ ]
A、少数民族进攻
B、用人不当
C、迁都所致
D、暴君统治
答案：D
Do you think it is difficult ____________?[ ]
A. study English well
B. studies English well
C. studying English well
D. to study English well
使用热水袋时，水温60～70℃适用于的患者是
A．肝昏迷患者B．全身瘫痪患者C．婴幼儿患者D．老年患者E．腹泻患者
