消除静电危害的主要措施可以分为三类()。
A.泄漏法、断路法和掺杂控制法
B.短路法、中和法和材料控制法
C.泄漏法、屏蔽法和工艺控制法
D.泄漏法、中和法和工艺控制法
参考答案:D
通风与空调系统调试方案应报( )审核批准。
A.项目经理
B.项目技术负责人
C.监理工程师
D.施工总承包单位负责人
If money is invested at r percent interest, compounded annually, the amount of the investment will double in approximately years.If Pat’s parents invested $5,000 in a long-term and that pays 8 percent interest, compounded annually, what will be the approximate total amount of the investment 18 years later, when Pat is ready for college ?