大黄黄连泻心汤的主治病证是（）
A.胃热壅盛之痞证
B.胃气虚弱之痞证
C.水热互结之痞证
D.胃虚有热之痞证
E.寒热错杂之痞证
参考答案：A
"胃之关"指的是( )
A．幽门
B．膀胱
C．肾
D．大肠
E．贲门
Tom looked upon the test as an obstacle _____ his classmates regarded it as a challenge. [ ]
A. while
B. because
C. unless
D. if
