以下提供若干个案例，每个案例下设若干道考题。请根据各考题题干所提供的信息，在每题下面的A、B、C、D、E五个备选答案中选择一个最佳答案。
| 女性，50岁，发现左 * * 肿块1周。查体：肿块位于左 * * 外侧，5cm×4cm大小，质硬，边界不清，腋窝可扪及一肿大淋巴结，活动，怀疑为乳腺癌。 |
为明确诊断，进一步的检查是
A．细针穿刺细胞学检查
B．钼钯照相
C．B超检查
D．红外线扫描
E．血清CEA检查
参考答案：B
解析：乳腺痛在钼靶上的重要表现首先是 * * 内高密度肿块，多表观为边缘有毛刺状浸润表现，可见小叉状、沙砾状、成簇的钙化点。腋窝淋巴结有肿大者也可以在钼靶的斜位片上显示。其中采些：乳腺癌可仅以成簇的钙化点为表现。乳腺的良性肿物钼靶影像主要为质地均匀中等密度肿物，边缘光滑，如有钙化则主要为圆圈、小斑片的钙化。
Passage Three
| While fashion is thought of usually in relation to clothing, it is important to realize that it covers a much wider domain. It is to be found in manners, the arts, literature, and philosophy, and may even reach into certain areas of science. In fact, it may operate in any field of group life, apart from the technological and utilitarian area and the area of the sacred．Its operation requires a class society, for in its essential character it docs not occur either in a homogeneous society like a primitive group, or in a caste society. Fashion behaves as a movement, and on this basis it is different from custom which, by comparison, is static．This is due to the fact that fashion is based fundamentally on differentiation and emulation. In a class society, the upper classes or so-called social elite are not able to differentiate themselves by fixed symbols or badges. Hence the more external features of their life and behavior are likely to be imitated by classes immediately below them, who, in turn, are imitated by groups immediately below them in the social structure. This process gives to fashion a vertical descent. However, the elite class finds that it is no longer distinguishable, by reason of the imitation made by others, and hence is led to adopt new differentiating criteria, only to displace these as they in turn are imitated．It is primarily this feature that makes fashion into a movement and which has led one writer to remark that a fashion, once launched, moves to its doom. As a movement, fashion show little resemblance to any of the other movements which we have considered．While it occurs spontaneously and moves along in a characteristic cycle, it in volves little in the way of crowd behavior and it is not dependent upon the discussion process and the resulting public opinion. It does not depend upon the mechanisms of which we have spoken. The participants are not recruited through agitation. No morale is built up among them. Nor does the fashion movement have, or required, an ideology. Further, since it does not have a leader- ship imparting conscious direction to the movement, it does not build up a set of tactics. People take part in the fashion movement voluntarily and in response to the interesting and powerful kind of control which fashion imposes on them. |
It can be inferred from the passage that a fashion movement
A．is a form of expressive behavior
B．contributes a great deal to the way of crowd behavior
C．can boost the morale of its participants
D．functions in the same way as specific social movements