急性腹痛的病人在去医院之前，应该怎么做？
参考答案：
去医院之前忍一下，不乱服用药物。
—Excuse me, where is Mr Brown's office?
—Sorry, I don't know. I ______ here for only a few days. [ ]
A. work
B. worked
C. have worked
D. will work
发现锅炉严重缺水，下列哪一项措施是正确的？
A.立即进水
B.严禁进水，采取紧急停炉措施
C.先进水，如发生异常立即停炉
