驾驶人在实习期内驾驶机动车时，应当在车身后部粘贴或者悬挂统一式样的实习标志。

血红蛋白Barts病，又称_____，是由于缺失4个_______，无___生成，正常______缺乏，而____自行聚合形成______。

Extreme Programming (XP) is a discipline of software development with (71) of simplicity, communication, feedback and courage. Successful software development is a team effort-not just the development team, but the larger team consisting of customer, management and developers. XP is a simple process that brings these people together and helps them to succeed together. XP is aimed primarily at object-oriented projects using teams of a dozen or fewer programmers in one location. The principles of XP apply to any (72) project that needs to deliver quality software rapidly and flexibly.

An XP project needs a(an) (73) customer to provide guidance. Customers, programmers, managers, are all working (74) to build the system that's needed. Customers - those who have software that needs to be developed - will learn simple, effective ways to (75) what they need, to be sure that they are getting what they need, and to steer the project to success.

（72）处填（）。

A．small-sized

B．moderately-sized

C．large-sized

D．huge-sized

如图所示，在xoy平面内，第Ⅲ象限内的直线OM是电场与磁场的边界，OM与负x轴成45°角。在x＜0且OM的左侧空间存在着负x方向的匀强电场E，场强大小为0.32 N/C； 在y＜0且OM的右侧空间存在着垂直纸面向里的匀强磁场B，磁感应强度大小为0.1 T。一不计重力的带负电的微粒，从坐标原点O沿y轴负方向以v₀ = 2×10³ m/s的初速度进入磁场，最终离开电磁场区域。已知微粒的电荷量q = 5×10^-18 C，质量m = 1×10^-24 kg，求：

（1）带电微粒第一次经过磁场边界的位置坐标；

（2）带电微粒在磁场区域运动的总时间；

（3）带电微粒最终离开电、磁场区域的位置坐标。

用于实现报表的分组统计数据的操作的是

A．报表的主体区域

B．页面页眉或页面页脚区域

C．报表页眉或报表页脚区域

D．组页眉或组页脚区域

城市沥青路面道路从材料上划分，路基划分的内容不包括( )。

A．土路基

B．石路基

C．土石路基

D．石灰土路基