搜题请搜索小程序“爱下问搜题”
问题 填空题
函数f（x）=log10(
x2+1
-x)是______（奇、偶）函数．
答案

因为

x2+1
-x＞0，所以f（x）的定义域为R，

因为f（-x）+f（x）=log10(

x2+1
-x)+log10(
x2+1
+x)

=log10(

x2+1
-x) (
x2+1
-x)=0

即f（-x）=-f（x）所以f（x）是奇函数．

故答案为：奇

单项选择题

There are fundamentally two possible changes in an economy that will each cause inflation unless other compensating changes also occur. There changes are either reductions in the supply of goods and services or increases in demand. In a prebanking economy the quantity of money available, and hence the level of demand, is equivalent to the quantity of gold available.
If the statements above are true, then it is also true that in a prebanking economy

A．any inflation is the result of reductions in the supply of goods and services.

B．if other factors in the economy are unchanged, increasing the quantity of gold available will lead to inflation.

C．if there is a reduction in the quantity of gold available, then, other things being equal, inflation must result.

D．the quantity of goods and services purchasable by a given amount of gold is constant.

E．(E) whatever changes in demand occur, there will be compensating changes in the supply of goods and services.
查看答案
多项选择题 案例分析题

患者女，32岁，骤发剧烈腹痛，伴腹胀、恶心、呕吐1d。发病以来未曾排便及排气，并且不敢翻身和深呼吸，拒腹部受压。12h前腹痛加重并出现烦躁不安，憋气，伴体温升高遂来急诊。发病前曾生吃西红柿及涮羊肉。3年前查体发现胆囊结石，无症状，未予治疗。既往无类似腹痛，无溃疡病史，2个月无月经。

经辅助检查后诊断已明确，治疗方式为（提示实验室检查：Hb96.1g/L，WBC18.9×109/L，AST21IU/L，BUN9.9mmol/L，TBil30μmol/L，DBil12μmol/L，血钙1.75mmol/L。）（）

A.禁食、胃肠减压、

B.开放静脉，输液，维持水和电解质平衡

C.急诊手术探查

D.应用抗生素及抑制分泌制剂

E.待各项检查完善，24h后手术治疗

F.暂时不予以处理，观察
查看答案