室内质控图中,警告线为()
A.±1s
B.±3s
C.±4s
D.±2s
E.±5s
参考答案:D
解析:室内质控图中,警告线为±2s,失控线为±3s。
下列哪项不是肺栓塞继发性危险因素()
A.长期卧床
B.恶性肿瘤
C.肾病综合征
D.蛋白C缺乏
E.口服避孕药物
Dear, I'll definitely take you to Shanghai next month _____ you perform well in this midterm examination. [ ]
A. in case
B. now that
C. so long as
C. so that