Which is the correct description of a pinned buffer in the database buffer cache（）

A .  float f = 11.1； B .  double d = 5.3E12； C .  double d = 3.14159； D .  double d = 3.14；.

A . Of the criminals arrested in 1970, 57 percent were youths below 25 of age. B . Lack of education has little to do with the crime rate. C . Differences in state laws for death penalty also account for the increase of crime rate. D . Drug smuggling is the only product of too many shows and reports.

A . A rich country gets benefits through trade at the expense of its poor country trading partners B . A poor country gets benefits through trade at the expense of its rich country trading partners C . In trade one side or the other must lose because the benefits must come from somewhere. D . In trade it is possible for every part involved winning at the expense of nobody

A.restaurant B.restarant C.restaurent D.restanrant

A.A bit of flowers. B.Few words. C.This work. D.Another two girls.

A．Thermal conductivity: metal ＜ plastics B．Thermal expansion: metal ＞ plastics C．Density: metal ＞ plastics D．None of the above

A．Filial responsibility in Singapore is enforced by law. B．Fathers have legal obligations to look after their children. C．It is an acceptable practice for the old to continue working. D．The Advisory Council was dissatisfied with the problems of the old.

A、All items that are included in M1 are included also in M2. B、All items that are included in M2 are included also in M1. C、Credit cards are included in both M1 and M2. D、Savings deposits are included in both M1 and M2.

A．In the UK, a million cars are stolen daily. B．In the UK, there are amateur car thieves only. C．There are more car crimes than any other type of offences. D．One in ten drivers invites car theft due to carelessness.

A．The writer was not used to bargaining. B．People in Asia always bargain when buying things. C．Bargaining in Laos was quiet and peaceful. D．The writer was ready to bargain with the woman.

A．室间的 B．心室的 C．室周的 D．室旁的

A．The man just got fire from a local grocery store. B．The woman forgot that the man is very optimistic. C．The woman won"t choose business as her major. D．The man doubts that she will make him proud.