铍和砷为剧毒致癌物质，对其水样进行检测和配制标准溶液时，应防止与皮肤直接接触，并保持室内有良好的排风系统。
参考答案：对
A nurse in a prenatal clinic is assessing a 28-year-old woman who is 24 weeks pregnant. Which of the following findings would lead this nurse to suspect that the client has mild preeclampsia
A．Hypertension, edema, proteinuria.
B．Glycosuria, hypertension, seizures.
C．Hematuria, blurry vision, reduced urine output.
D．Burning on urination, hypotension, abdominal pain.
下列哪一项不是气厥实证的病因病机：
A．气血上壅
B．情志过极
C．气机逆乱
D．恼怒惊骇
E．蒙闭窍隧
