Why is gas-freeing rarely required for LPG cargo tanks? （）
A . LPG is compatible with all cargos
B . LPG's high oxygen content makes it nonvolatile
C . Cargo tanks are inspected less frequently than on oil tankers
D . The cargo tanks are used for one type of cargo only
相似题目
-
Which step is NOT generally taken when gas-freeing a tank?（）.
A . Washing the tank interior with sea water
B . Application of degreasing solvents
C . Removal of corrosion products and sludge
D . Fresh air ventilatio
-
Hurricanes may move in any direction．However，it is rare and generally of short duration when a hurricane in the Northern Hemisphere moves toward the（）.
A . West or northwest
B . Northeast
C . Southeast
D . North
-
In requirements engineering, requirements elicitation is the practice of collecting the requirements of a system from users, customers and other stakeholders. In the following practices, () is rarely used in requirements elicitation.
A . brain storming
B . interview
C . questionnaire
D . Monte Carlo analysis
-
Except in rare cases,it is impossible to extinguish a shipboard fire by（）.
A . removing the heal
B . removing the oxygen
C . removing the fuel
D . interrupting the chain reactio
-
Except in rare cases, it is impossible to extinguish a shipboard fire by （）.
A . removing the heat
B . removing the oxygen
C . removing the fuel
D . interrupting the chain reactio
-
On Pandora corporations from earth are mining a rare mineral that is the key to solving the energy crisis on Earth.
-
The economic recession has meant that job _____ is a rare thing.
-
Why is brainstorming important?
-
Why is integrity compared to the weather?
-
Why is Yellowstone National Park important?( )
-
Why is it called square dance?
-
This is such a rare offer that we cannot hope to get another one like it; you shouldn’t _______ at this opportunity.
-
1. Why is Nathan confused?
-
A) She started collecting stamps from her childhood. B) A good stamp collection can be built in a short time. C) A rare set of stamps is worth a lot of money, D) It is nearly impossible to collect a rare set of stamps.
-
“Why is that ” she wanted （）know.
A．apart
B．at
C．to
D．on
-
__________most of the earth‘s surface is covered by water， fresh water is very rare and precious．
A.As
B.Once
C.If
D.Although
-
Flowcharting is used primarily for program design and rarely for systems design.（)
是
否
-
What I want to know is why he is still here. （翻译)
-
Why is the man late？
A．The trains were delayed.
B．He couldn't find a bus stop.
C．Something went wrong with his friend's motorbike.
-
Most children with healthy appetites are ready to eat almost anything that is offered to them and a child rarely dislikes food【C1】______it is badly cooked.
The【C2】______a meal is cooked and served is most important and an【C3】______served meal will often improve a child's appetite. Never ask a child【C4】______he likes or dislikes a food and never【C5】______likes and dislikes in front of him or allow【C6】______else to do so. If the father says he hates fat meat or the mother【C7】______vegetables in the child's hearing he is【C8】______to copy this procedure. Take it【C9】______granted that he likes everything and he probably【C10】______. Nothing healthful should be omitted from the meal because of a【C11】______dislike. At meal times it is a good【C12】______to give a child a small portion and let him【C13】______back for a second helping rather than give him as【C14】______as he is likely to eat all at once. Do not talk too much to the child【C15】______meal times, but let him get on with his food, and do not【C16】______him to leave the table immediately after a meal or he will【C17】______learn to swallow his food【C18】______he can hurry back to his toys. Under【C19】______circumstances must a child be coaxed(哄骗)【C20】______forced to eat.
【C1】
A．if
B．until
C．that
D．unless
-
Why is Margaret Chan disappointed？
A．No important steps to stop climate change have been taken.
B．Many droughts and floods have been reported worldwide.
C．No deal on climate change was struck at the Copenhagen conference.
-
The climate in London is quite pleasant, the temperature rarely, ifany, ________ 30 ℃ .
A.reaches
B.reached
C.hasreached
D.reaching
-
Why is Ronaldo going to Europe？
A．To give a presentation
B．To visit the company's offices there
C．To supervise the European headquarters
D．To tour factories the company wants to buy
-
Is the comfortable zone for everyone the same？ Why or why not？
