国家对严重危及生产安全的工艺、设备实行改进制度生产经营单位不得使用明令淘汰、禁止使用的危及生产安全的工艺、设备。
参考答案：错
A client with heart failure asks the nurse about the reason for taking enalapril maleate. The nurse would explain that the medication is prescribed for which of the following reason
A．Lower the blood pressure by increasing peripheral vasoconstriction.
B．Lower the heart rate by slowing the conduetion system.
C．Block the conversion of angiotensin Ⅰ to angiotensin Ⅱ.
D．Increase myocardial contractility, thereby improving cardiac output.
正常情况下，经纬仪整平后，（）不一定处于水平位置。。
A.横轴
B.视准轴
C.管水准轴
D.水平度盘
