关于长江和黄河的共同特点，正确的是[ ]
A．都注入太平洋
B．都发源于云贵高原
C．都流经西藏和青海
D．都发源于青藏高原
AD
Sam said sorry to his mother , so she _________.
A．forgave his mistakes
B．forgave him of his mistakes
C．forgave him about his mistakes
D．forgave him for his mistakes
慢性肺炎是指病程超过（）。
A.1个月
B.3个月
C.5个月
D.6个月
E.12个月
