The emergency generator or emergency battery is connected to（） on most large ships.
A single fitting installed in a pipeline that either blanks off the pipe or allows a full flow passage of a liquid through the pipe is referred to as a（）.
Generally speaking, suction heads require to be （） for high speed or large capacities than for low speed or small capacities.
Although Australia has a large area,（）of the continent is desert or semi-desert.
Pipes made of plastic are now widely used in building as they are light and do not become （）in water.
When installed for bilge pumping or ballast duty, centrifugal pumps require a （） to remove air from the suction pipe.
A large valve，usually installed above the ram preventers，that forms a seal in the annular space between the pipe and wellbore or，if no pipe is present，on the wellbore itself is called the（）.
Large pipes or down-comers are fitted between the steam drum and （） to ensure good natural circulation of water.
Cargo pump relief valves are piped to the（）.
If no gaskets are used in the piping joints of a Freon system, the joints must be（）
Cast iron and gunmetal fittings are used freely in small sizes at moderate pressure; large fittings, those for high pressure and temperature are cast or mild steelIn the above sentence, the word “those” means （）.
A tool consisting of a handle and releasable chain used for turning pipe or fittings of a diameter larger than that which a pipe wrench would fit is called（）.
Persons who have swallowed a non-petroleum based poison are given large quantities of warm soapy water or warm salt water to （）
Clouds that form as small white flakes or scaly globular masses covering either small or large portions of the sky are（）.
The trees that they are usually very large sometime they have the colored hadags rapped around them or hanging from the branches, these trees are called Shangxin Mod.
True or False: It is home to a large population of endangered Macaque monkeys. （ ）
Clouds that form. as small white flakes or scaly globular masses covering either small or large portions of the sky are ().
Traditionally， large shippers build factories andwarehouses near rail lines and have a section of track on their property calleda（）where goods are loaded on to or unloaded from railcars.
Few gardens are large enough to ____ a full-grown tree like oak or beech.
A manufacture packages soap powder in containers of three different sizes. The amount of soap powder in a full large container could fill exactly 3 of the medium containers or exactly 5 of the small containers. If an equal number of small and large containers are to be filled with the amount of soap powder that would fill 90 medium containers, how many small containers will be filled？
Or, will the extraordinarily large number of 15 voters in Iran prefer to apply the brakes
Elephants are perhaps the only animals that are hunted for their teeth. Elephant tusks, or very large teeth growing on either side of their mouths, are composed of a valuable material called ivory(象牙).
In order to prevent stress from being set up in the metal, expansion joints are fitted which ________ the stress by allowing the pipe to expand or contra ct freely.
（）is more suitable for bulk cargo or unpacked cargo such as logs，steel bars，pipes，etc．
