（）是一种较为直观的，通过分析基金在不同市场环境下现金比例的变化情况来评价基金经理择

若-1，a，b，c，-9成等差数列，则b=______，ac=______．

陶瓷过滤机混合清洗的酸液浓度是（）左右。

A、1%

B、50%

C、90%

D、10%

Pharming is a scamming practice in which malicious code is installed on a personal computer or server, misdirecting users to ______ Web sites without their knowledge or consent. Pharming has been called"phishing without a lure".
In phishing, the perpetrator sends out legitimate-______ e-mails, appearing to come from some of the Web’s most popular sites, in an effort to obtain personal and financial information from individual recipients. But in pharming, larger numbers of computer users can be ______ because it is not necessary to target individuals one by one and no conscious action is required on the part of the victim. In one form of pharming attack, code sent in an e-mail modifies local host flies on a personal computer. The host files convert URLs into the number strings that the computer uses to access Web sites. A computer with a compromised host file will go to the fake Web site even if a user types in the correct Internet address or clicks on an affected ______ entry. Some spyware removal programs can correct the corruption, but it frequently recurs unless the user changes browsing ______.

A．habits signature
B．site
C．tages
D．address

下列产科处理哪项不正确？（）

A.头位死胎，宫口开全，先露已入盆一穿颅术

B.胎儿窘迫，头位，宫口开全一产钳术

C.臀位，脐带脱垂，宫口开全一臀牵引术

D.横位，死胎，先兆子宫破裂一碎胎术

E.臀位，足先露一剖宫产术

公司某部门用户开发了一种批处理主机程序，可以用来为成本中心获取财务信息。这个程序从总账系统主文件备份磁带中抽取数据。该系统要求磁带备份的当前版本。那么用户最有可能发觉下面（）错误情形。

A．使用了每月初步结束的文件

B．任务未被成功完成

C．使用了错误的程序版本

D．程序处理逻辑中有错误