A safety outlet is provided on the CO2 discharge piping to prevent（）.
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（）.
A hot air start pipe indicates that there is （）.
As oil pipe line connections were broken，（）quantity of oil was caused to spill onto the wharf and into the dock water.
A butterfly valve consists basically of a disc pivoted across the bore of a ring body having the same radial dimensions as the pipe in which it is fitted.According to the above sentence, which of the following statements is not true?（）
What will NOT increase friction of a liquid flowing in a pipe and cause a loss of suction head?（）.
（）is not a process of weathering of the oil spilled in the sea water.
（）is a caing used for exhaust pipe from the engines.
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（）.
A heavy，thick-walled tube，usually steel，used between the drill pipe and the bit in the drill stem to weight the bit in order to improve its performance is called a（）.
The system of valves and cargo lines in the bottom piping network of a tank vessel that connects one section of cargo tanks to another section is called a（）.
In the piping systems of a vessel，what type of valve gives the least resistance to fluid flow when fully open?（）.
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（）.
A vessel emitting harmful substances into the air or spilling oil into the sea is a（）.
The piping that routes an oil cargo from the manifold to underdeck pipelines is known as a （）.
The system of valves and cargo lines in the bottom piping network of a tanker that connects one section of cargo tanks to another section is called a（）.
What is cause and what is effect？A cause is what ______ something happen; an effect is what happens as result of a ______.
根据回答，请选择问句。A. What is a freeway?B. What is a free way?--- There is no charge
121.A vessel emitting harmful substances into the air or spilling oil into the sea is a( )。
Designing a city by differentiating what is public and what is private is a key part of which architectural design?
He has the occasional cigarette, but ______ he smokes a pipe that is more harmful to his health.
One day I can hear the faint rustle of autumn coming. The next day I can’t. One evening summer leaks away into the cool night sky, but the next morning it’s back again. But there is headway. Birdsong has gone, and is【46】______ (replace) by a whining bag-piping of insect creation. I look out across the pasture as dusk【47】______(begin) and see a shining galaxy of airborne bugs. What would it be like, I wonder, to have an【48】aware______of the actual number of insects on this farm？
A hotelworker is responsible for many different areas of a hotel and is called upon to fix problems as they arise（like a leaking pipe）（）
