图是地震波速度和地球构造图，据图完成5～6题。

小题1:关于地震波的叙述，不正确的是（  ）

A．④通过固体、液体传播，③的传播只能通过固体。

B．④传到②时，波速突然下降

C．④和③传到①时波速加快

D．④的传播速度低于③小题2:不连续面①上下两侧名称分别为（  ）

A．地幔和地核

B．岩石圈和上地幔

C．地壳和地幔

D．地幔和地壳

Pharming is a scamming practice in which malicious code is installed on a personal computer or server, misdirecting users to (1) fraudulent Web sites without their knowledge or consent. Pharming has been called "phishing without a lure".

In phishing, the perpetrator sends out legitimate- (2) 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 (3) 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 (4) bookmark entry. Some spyware removal programs can correct the corruption, but it frequently recurs unless the user changes browsing. (5) habits,

1（）

A．few

B．fraudulent

C．normal

D．structured