棘间韧带损伤主要诊断依据是A．依据病史B．压痛点C．腰椎正侧位片D．椎管造影E．MR

室温下，下列说法正确的是  [ ]

A．将pH=1的H₂SO₄和pH=3的HCl等体积混合，所得溶液pH=2

B．HF比HCN易电离，则NaF溶液的pH比同浓度NaCN溶液的pH大

C．向0.1 mol/LCH₃COOH溶液中加入少量CH₃COONa固体，溶液中增大

D．将1 mL pH＝3的HX溶液稀释到10 mL，若溶液的pH＜4，则HX为弱酸

若f(x)是R上周期为5的奇函数，且满足f(1)=1，f(2)=2，则f(3)-f(4)=（   ）

A．-1

B．1

C．-2

D．2

请仔细阅读下列材料，按要求回答问题．

据有关专家介绍，视觉环境中的噪光污染大致可分为三种：一是室外视环境污染，如建筑物外墙；二是室内视环境污染，如室内装修采用镜面、瓷砖和白粉墙日益增多以及室内不良的光色环境；三是局部视环境污染，如近距离读写使用的书簿纸张越来越光滑．经研究表明，噪光污染可对人眼的角膜和虹膜造成伤害，抑制视网膜感光细胞功能的发挥，引起视疲劳和视力下降．

（1）以下四种视觉环境中，属于局部视环境污染的是______

A．高大建筑物的玻璃幕墙

B．宾馆的大厅大面积采用的釉面砖墙和磨光大理石

C．在居住的卧室里安装各种颜色的荧光灯

D．在写字台上铺一块白色且光滑的塑料布

（2）以下四个场所中，不易受到噪光污染危害的是______

A．网吧       B．现代舞厅      C．森林公园      D．百货商场

（3）阅读上文，你认为形成噪光污染的主要原因是______

A．光的反射    B．光的折射      C．光有能量      D．光沿直线传播

（4）请你就如何有效的预防噪光污染，提出一条合理的建议：

虚拟变量

Pharming is a scamming practice in which malicious code is installed on a personal computer or server, misdirecting users to (71) fraudulent Web sites without their knowledge or consent. Pharming has been called "phishing without a lure".

In phishing, the perpetrator sends out legitimate- (72) looking e-malls, 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 (73) victimized 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 files 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 (74) bookmark entry. Some spyware removal programs can correct the corruption, but it frequently recurs unless the user changes browsing. (75) habits,

（72）是（）

A.connecting

B.binding

C.looking

D.contenttagging