Ireland has the following demographic features except（）.
第1题：
Everything on the earth _____ all the time.
A. is changing
B. is changed
C. has changed
D. has been changed
第2题：
The certificate of pratique certifies that ______.
A.the ship has no rats or mice on board
B.no quarantinable disease has been found on the vessel
C.no person has died during the voyage the ship has just completed
D.all the crew members have no health problem
第3题：
A.had been collected
B.has collected
C.has been collected
第4题：
The following are the reasons why British coal mining is today called a"sick"industry except（）
ABritain has used up almost all coal deposits
Bthe demand for British coal has declined
Cpetroleum,water power,and electric power are replacing coal for many purposes
Dthe old British mines are narrow and deep,making it difficult to sue machines fro mining.
第5题：
A crew member reports that the high-pressure alarm light of a low-pressure CO2 fixed fire extinguishing system is illuminated．The most probable cause of this condition would be that ______．
A.an air leak has developed in the tank
B.the tank cooling system has malfunctioned
C.the pilot cylinder discharge valve is leaking
D.an excessive amount of insulation has been installed on the tank and piping
第6题：
A、have sold
B、have been sold
C、has sold
D、has been sold
第7题：
Before leaving port on an ocean tow，a tug captain should assure himself of all the following EXCEPT ______.
A.the towing hawser can be released quickly in an emergency
B.the correct navigation lights are rigged and operable on the tug and tow
C.an insurance underwriter has prepared a pre-sailing survey
D.a pick-up wire has been rigged on the tow in case of a breakaway.
第8题：
All _____ is sheer nonsense. We must find a way out right now.
A. what has been said
B. the things
C. that has been said
D. of has been said
第9题：
Ireland has the following demographic features except（）.
Ait has a low birthrate
Bit has a late marriage age
Cit has an excess of females in the population
Dit has a high proportion of bachelors and spinsters of all ages
第10题：
When an ICMP redirect is received， which of the following options is the most appropriate to conclude？（）