（）是一个事后衡量指标，在事前进行投资决策时具有很强的主观性。
A. 名义收益率
B. 即期收益率
C. 持有期收益率
D. 到期收益率
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Ifaninflatableliferaftinflatesupsidedown，youcanrightitby（）.
A. pushingupononeside
B. standingontheCObottle，holdingthebottomstraps，andthrowingyourweightbackwards
C. gettingatleastthreeorfourmentopushdownonthesidecontainingtheCOcylinder
D. doingnothing;itwillrightitselfafterthecanopysupportsinflate
Ifaninflatableliferaftisoverturned，itmayberightedby（）.
A. fillingthestabilizersononesidewithwater
B. releasingtheCOcylinder
C. pushingupfromunderoneend
D. standingontheinflatingcylinderandpullingonthestrapsontheundersideoftheraft
Ifaninflatableliferaftistobereleasedmanually，whereshouldtheoperatingcordbeattachedbeforethrowingtheraftoverboard?（）
A. Donotattachthecordtoanythingbutthrowitoverboardwiththeraftcontainer
B. Attachthecordtoafixedobjectontheship
C. Youshouldstandonthecord
D. Attachthecordtothespecialpadeyeontheraftdavitlauncher
Inflatableliferaftsareprovidedwith（）.
A. aVerypistol
B. atowingconnection
C. aportableradio
D. cannedmilk
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