第1题：
The three basic components of a fire are chain reaction, heat, fuel, and ____.
A.carbon monoxide
B.oxygen
C.carbon dioxide
D.any gaseous substance
第2题：
What are the two main types of stud link chain ________．
A.Oil Rig chain and Oil Field Stud Link chain
B.Flash-butt welded chain and Di-Lok chain
C.Flash-butt welded chain and Oil Rig chain
D.Oil Field Stud Link chain and Flash-butt welded chain
第3题：
对于极微量的靶序列的扩增可以采用的PCR技术是
A、通用引物-PCR方法(general primer-media-ted PCR，GP-PCR)
B、多重PCR(multiplex PCR)
C、套式PCR(nested primers-polymerase chain reaction，NP-PCR)
D、AP-PCR方法(arbitrarily primed PCR)
E、原位PCR技术(in situ PCR，ISPCR)
第4题：
In anchor orders, “Up and down” means “（）”.
第5题：
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 reaction
第6题：
A chain stripper is used to ______.
A.prevent chain from clinging to the wildcat
B.clean the marine debris from the chain
C.flake chain from a boat's chain locker
D.clean chain prior to an x-ray inspection
第7题：
A fire of escaping liquefied flammable gas is best extinguished by ______.
A.cooling the gas below the ignition point
B.cutting off the supply of oxygen
C.stopping the flow of gas
D.interrupting the chain reaction
第8题：
对于极微量的靶序列的扩增可以采用的PCR技术是
A、通用引物－PCR方法(general primermediated PCR，CJP－PCR)
B、多重PCR(multiplex PCR)
C、套式PCR(nestcd primers－polymerasc chain reaction，NP－PCR)
D、AP－PCR方法(arbitrarily primcd PCR)
E、原位PCR技术(in situ PCR，ISPCR)
第9题：
第10题：
对于极微量的靶序列的扩增可以采用的PCR技术是（）