LKJ的数字量输入/输出插件所有输入通道采用光电隔离方式进行隔离,隔离电压不低于()。
参考答案:1000VAC
( )属于货币市场工具。
A.股票 B.企业债券 C.商业票据 D.投资基金
A fire broke out in a commercial mall unexpectedly, ________ the customers and the persons working there fleeing for safety.
A.making
B.causing
C.forcing
D.sending