Which types of portable fire extinguishers are designed for use on electrical fires?()
A、Dry chemical and carbon dioxide
B、Foam (stored pressure) and soda-acid
C、Carbon dioxide and foam (stored pressure)
D、Dry chemical and soda-acid
A、Dry chemical and carbon dioxide
B、Foam (stored pressure) and soda-acid
C、Carbon dioxide and foam (stored pressure)
D、Dry chemical and soda-acid
A、two rockets,one of which shall be the buoyant type B、three rockets,one of which shall be the buoyant type C、four rockets,two of which shall be the buoyant type D、five rockets,two of which shall be the buoyant type
A、The type of application used on the network B、The type of system bus used by the computers C、The type of memory installed in each computer D、The type of media used in the network topology E、The type of protocols used in the network F、The physical layout of the network hosts
A、U-Type and posilok shackles B、C-Type and wedge shackles C、D-Type and bow shackles D、wedge and kenter shackles
A、FIELD Type :="action" B、SELECT Type ="action" C、SELECT Type :="action " D、@if (type="action";@success;@failure)