称为"水谷气血之海"的是（）
A.脾
B.胃
C.大肠
D.小肠
E.三焦
参考答案：B
—________ the job in the police station exciting?
—Yes. But it is also dangerous.[ ]
A. Do
B. Does
C. Is
D. Are
妊娠期急性肾盂肾炎，尿培养最常见的致病菌是
A．大肠杆菌B．肺炎球菌C．金葡菌D．变形杆菌E．产气杆菌
