按照世界卫生组织的说法，大约有300种危险因素与心血管疾病相关，这些危险因素在全球人口中都显著存在，以下不属于其中最危险的5种因素的是（）
A. 烟草
B. 酒精
C. 肥胖
D. 缺乏锻炼
查看答案
螳螂被看成是一种冷酷无情的昆虫。
A. 正确
B. 错误
构成侵害肖像权的民事责任须以营利为目的。
A. 正确
B. 错误
In the communications industry, what are the features and benefits of using the layered OSI model?（）
A. It encourages industry standardization by defining what functions occur at each layer of the model.
B. It necessitates changes in functionality in one layer to other layers.
C. It enables equipment efficiency from different vendors to use the same electronic components.
D. It divides the network communication process into smaller and simpler components, thus aiding component development, design, and troubleshooting.
E. It supports the evolution of multiple competing standards, and thus enhances business equipment manufacturing opportunities.
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