【单选题】Which of the following actions should be taken first to control an oil fire in a fuel oil tank?
A.
commence draining that tank as quickly as possible
B.
seal off all vents to that tank
C.
activate the CO2 system to that tank
D.
shut off the steam heating coils
【单选题】“交易费用”这个概念是由谁提出的?( )
【单选题】高速计数器的设计目的是为了接受外部()范围的高频脉冲
【单选题】Which of the actions listed should be taken FIRST to control an oil fire in a fuel oil tank?
A.
Commence draining that tank as quickly as possible
B.
Seal off all vents to that tank
C.
Activate the CO2 system to that tank
D.
Shut off the steam heating coils
【单选题】有以下四个结论: ①lg(lg10)=0; ②lg(lne)=0; ③若e=lnx,则x=e 2 ; ④ln(lg1)=0. 其中正确的是( )
【单选题】The fire of fuel oil is termed _______fire.
【单选题】已知一元二次不等式 的解集为{x丨x5},则a+b=()
【单选题】有以下四个结论:1lg(lg10)=0;2ln(lne)=0;3若10=lgx,则x=10;4若e=lnx,则 ,其中正确的是