变更车道时只需开启转向灯，并迅速转向驶入相应的车道，以不妨碍同车道机动车正常行驶。

如图所示，有两个相邻的有界匀强磁场区域，磁感应强度的大小均为B，磁场方向相反，且与纸面垂直，磁场区域在x轴方向宽度均为a，在y轴方向足够宽。现有一高为a的正三角形导线框从图示位置开始向右沿x轴方向匀速穿过磁场区域。若以逆时针方向为电流的正方向，在下图中，线框中感应电流i与线框移动的位移x的关系图象正确的是

A.

B.

C.

D.

Remote administration types are an example of one kind of (71) malicious software, the Trojan horse, or more simply Trojan. The purpose of these programs isn’t replication, (72) to penetrate and control. That masquerade as one thing when in fact they are something else, usually something destructive. There are a number of kinds of Trojans, including spybots, (73) report on the Web sites a computer user visits, and keybots or keyloggers, which record and report the user’s keystrokes in order to discover passwords and other confidential information.

RATS attempt to give a remote intruder administrative control of an infected computer. They work as (74) pairs. The server resides on the infected machine, while the client resides elsewhere, across the network, where it’s available to a remote intruder. Using standard TCP/IP or UDP protocols, the client sends instructions to the server. The server does (75) it’s told to do on the infected computer.

（75）处填（）。

A．that

B．what

C．which

D．those

UML图中既包含展示系统动态特性的动态视图，又包括展示系统静态特性的静态视图， 关注系统的静态特性。

A．类图
B．序列图
C．通信图
D．状态图

甲公司经营A、B产品，2001年A产品销售收入为300万元，B产品销售收入为250万元；2002年A产品销售收入为330万元，B产品销售收入为275万元。则甲公司2002年销售收入增长率为( )。

A．9%

B．10%

C．11%

D．12%

下列哪种器官同时具有体循环和肺循环：（）

A.肝脏

B.肾脏

C.肺脏

D.脾脏