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面对世界经济危机，我国出台积极的宏观经济政策，保增长、扩内需、调结构。下列宏观调控措施中能起到扩大内需作用的有( )。

A．降低银行贷款利率

B．降低政府行政管理支出

C．加大政府投资力度

D．提高出口商品关税税率

幕上急性硬膜外血肿的CT检查影像学特征是（）。

A.透镜状高密度影

B.透镜状低密度影

C.新月形高密度影

D.新月形低密度影

E.不规则高密度影

在权益法核算下，投资时因投资成本小于应享有的被投资企业的所有者权益的份额所产生的30万元差额已计入“资本公积”的；如果该项投资发生减值时，需计提50万元的减值准备时，其账务处理为：借记资本公积30万元，借记投资收益20万元，贷记长期投资减值准备50万元，当以后需转回投资减值准备40万元时，则应作账务处理为：借记长期投资减值准备40万元，贷记资本公积30万元，借记投资收益10万元。( )

There were two widely divergent influences on the early development of statistical methods. Statistics had a mother who was dedicated to keeping orderly records of governmental units (state and statistics come from the same Latin root, status) and a gentlemanly gambling father who relied on mathematics to increase his skill at playing the odds in games of chance. The influence of the mother on the offspring, statistics, is represented by counting, measuring, describing, tabulating, ordering, and the taking of censuses—all of which led to modem descriptive statistics. From the influence of the father came modem inferentical statistics, which is based squarely on theories of probability.

Descriptive statistics involves tabulating, depicting, and describing collections of data. These data may be either quantitative, such as measures of height, intelligence, or grade level—variables that are characterized by an underlying continuum or the data may represent qualitative variable, such as sex, college major, or personality type.

Large masses of data must generally undergo a process of summarization or reduction before they are comprehensible. Descriptive statistics is tool for describing or summarizing or reducing to comprehensible form the properties of an otherwise unwieldy mass of data.

Inferential statistics is a formalized body of methods for solving another class of problems that present great difficulties for the unaided human mind. This general class of problems characteristically involves attempts to make predictions using a sample of observations. For example, a school superintendent wishes to determine the proportion of children in a large school system who come to school without breakfast, have been vaccinated for flu, or whatever. Having a little knowledge of statistics, the superintendent would know that it is unnecessary and inefficient to question each child; the proportion for the entire district could be estimated fairly accurately from a sample of as few as 100 children. Thus, the purpose of inferential statistics is to predict or estimate characteristics of a population from knowledge of the characteristics of only a sample of the population.

What is the purpose of examining a sample of a population（）

A. To tabulate collections of data

B. To compare different groups

C. To consider all the quantitative variables

D. To predict characteristics of the entire population

随着重大节假日小客车免收通行费政策的出台，选择自驾游的游客大幅增加，受此影响，以旅行社为龙头的传统运营模式受到挑战，而在线游客旅游服务商提供的网上订单式服务备受青睐。由此可见（）

①游客的消费需求推动着旅游业运营模式的创新

②游客的消费动向决定着旅游服务产品的推出

③游客的消费需求对旅游企业服务方式的转变起着导向作用

④游客消费方式的变化推动着旅游服务质量的提高

A、①②

B、①③

C、②④

D、③④