画圆柱的两侧轮廓线，与（）相切。
A、底圆
B、顶圆
C、两端面椭圆
D、椭圆
参考答案：C
A client is admitted with a suspected diagnosis of an acute myocardial infarction. When providing care for the client, the nurse should avoid which route when taking a temperature
A．Oral.
B．Rectal.
C．Axillary.
D．Tympanic.
水中哪些物质过高，可与饮料中的有机酸形成不溶性沉淀（）
A．铁
B．铅
C．钙和镁盐
D．糖
E．SO2
