久病累及脾肾，以致脾肾阳虚，温煦气化失司，可以形成（）
A．风气内动
B．寒从中生
C．湿浊内生
D．津伤化燥
E．火热内生
参考答案：B
To their surprise, they found the lecture given by the famous professor easy ______. [ ]
A. to be understood
B. to understand
C. understanding
D. understood
中央红军长征共经过全国（）个省区。
A.10
B.11
C.12
