用一种种子作发芽试验，结果475粒发芽，25粒未芽，发芽率是______，如果按

She is new here，so she has _______friends at school.

A．much

B．few

C．little

D．A little

某小区召开首次业主大会，并成立了业主委员会。按照《物业管理条例》规定，该业主委员会应当自选举产生之日起（）日内，向物业所在地的区、县人民政府房地产行政主管部门备案。

A.30

B.45

C.60

D.90

将mg硫在ng氧气中燃烧所生成二氧化硫的质量，下列答案中你认为最合理的是（　　）（m可与n相等，也可不相等）

A．一定等于（m+n）g

B．一定小于（m+n）g

C．可能是小于或等于（m+n）g

D．以上答案都正确

According to the Global Investment Performance Standards (), which of the following statements is most accurat.e about composites used for performance presentation of a investment management firm（）

A. Composites must include one or more portfolios managed to a similar investment strategy, objective or mandate.

B. Composites must include all discretionary and non-discretionary portfolios managed to a similar investment strategy, objective or mandate.

C. Composites must include all fee-paying and non-fee paying portfolios managed to a similar investment strategy, objective or mandate.

管理信息系统是集成化系统的概念，要求管理信息系统要有一个______，以指导它的各子系统的实现。

A．战略计划

B．总体的系统计划

C．长期计划

D．一体化的数据库