电子反对抗是指防止敌方或己方的电子对抗措施影响己方的设备和人员作战效能所进行的各种活动，以防护己方的战斗力不遭受其损害，主要措施包含电子反侦察、电子反干扰、抗反辐射摧毁、抗定向能致盲和抗计算机病毒传染。根据上述定义，下列选项不涉及电子反对抗的是（ ）
A．军事演习前，演习指挥中心提前对使用的电脑进行病毒查杀
B．发射车向敌方发射反辐射导弹，关闭己方电子设备以免误击
C．军舰在冲突海域降低雷达发射信号功率，并设置反辐射诱饵
D．为对抗敌方电子干扰，指挥部决定重要指令用固定电话下达
参考答案：D
解析：D项中的“用固定电话下达”不属于电子反对抗。
| I want to divide human understanding into two kinds—classical understanding and romantic understanding. In terms of ultimate truth, a distinction of this sort has little meaning, but it is quite legitimate when one is operating within the classic mode used to discover or create a world of underlying form. The terms classical and romantic, as Phaedrus used them, mean the following: A classical understanding sees the world primarily as underlying form itself. A romantic understanding sees it primarily in terms of immediate appearance. If you were to show an engine or a mechanical drawing or electronic scheme to a romantic, it is unlikely he would see much of interest in it. It has no appeal because the reality he sees is its surface. Dull, complex lists of names, lines and numbers. Nothing interesting. But if you were to show the same blueprint or give the same description to a classical person, he might look at it and then become fascinated by it because he sees that within the lines and shapes and symbols is a tremendous richness of underlying form. The romantic mode is primarily inspirational, imaginative, creative, intuitive. Feelings rather than facts predominate. "Art" when it is opposed to "Science" is often romantic. It does not proceed by reason or by laws. It proceeds by feeling, intuition and esthetic conscience. In the northern European cultures the romantic mode is usually associated with femininity, but this is certainly not a necessary association. The classic mode, by contrast, proceeds by reason and by laws—which are themselves underlying forms of thought and behavior. In the European cultures it is primarily a masculine mode and the fields of science, law and medicine are unattractive to women largely for this reason. Although motorcycle riding is romantic, motorcycle repair and maintenance are purely classic. The dirt gives it such a negative romantic appeal that women never go near it. |
As you see it, ______ would best describe the tone of this passage.
A．neutral and factual
B．indignant and secretive
C．upbeat and enthusiastic
D．personal yet reasonable