【单选题】The ____pump is usually used as the emergency bilge pump.
【简答题】A solar pump(太阳能水泵 ) was built in a desert small village. The pump used the deserts most common resource – sunlight, to increase its greatest need, water. Solar collectors were used to collect the sun...
【单选题】The lube oil pump used in a diesel engine is a ().
【单选题】在 C 语言中 , 以下叙述不正确的是
A.
在 C 程序中 , 无论是整数还是实数 , 都能被准确无误的表示
B.
在 C 程序中 , 变量名代表存储器中的一个位置
【单选题】在C语言中,以下叙述不正确的是
A.
在 C 程序中 , 无论是整数还是实数 , 都能被准确无误的表示
B.
在 C 程序中 , 变量名代表存储器中的一个位置
D.
一个 C 语言的执行是从程序的主函数开始 , 到程序的主函数结束
【单选题】The ____pump is usually used as the bilge feed pump to an oily water separator.
【单选题】The purpose of the wearing rings used in a centrifugal pump is to ().
A.
prevent an internal explosion in the pump when it is overheated
B.
enable a visual inspection of the pump while it is running
C.
insure a proper alignment of the pump coupling to the driver
D.
accommodate for friction between the impeller and the easing
【单选题】On a ship,a fire pump may be used for other purposes if().
A.
the other services are run off a reducing station with a pressure gage
B.
a separate fire pump is available for use on the fire main
C.
all other services are operated by a manifold near the pump