幽门螺杆菌根除疗效的监测方法首选
A.快速尿素酶试验
B.组织切片染色法
C.微氧下细菌培养法
D.13C-或14C-尿素呼气试验
E.血清抗幽门螺杆菌抗体检测
参考答案:D
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—I'm fifteen. I was born _____ 1990. [ ]
A. in
B. at
C. on
D. for
当客户认为计费电能表可能不准时,怎么办?