题目内容
下列哪项是促使心脏病孕妇死亡的主要原因
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The producers of instant coffee found their product strongly resisted in the market places in spite of their products’ manifest advantages. However, the advertising expenditure for instant coffee was far greater than which for regular coffee. Efforts were made to find the cause of the consumers’ seemingly reasonable resistance to the product. The reason given by most people were dislike of the taste. The producers suspected that there might be deeper reasons, however. This confirmed by one of motivation research’s classic studies, one often cited in the trade. Mason Haire of the University of California, constructed two shopping lists that were identical except from one item. There were six items common to both lists with the brands or amounts specify. The seventh item, in fifth place on both lists, read Maxwell House coffee on one list and Nestle Instant Coffee on other. One list was given to each one in a group of fifty women, and the other list to those in another group of the same size. The women were asked to study their lists and then to deseribe, as far they could, the kind of women (personality and character) who would draw up that shopping list. Nearly half of those who had received the list including instant coffee was described a house-wife who was lazy and a poor planner. On the other hand, only one woman in the other group described the housewife, who had included regular coffee on her list, as lazy. ______
砷盐检查需要的试药 吸收硫化氢气体
目前，影响PC机运行安全的最大威胁是【16】，它县有破坏性、隐蔽性、传染性和潜伏性等特点。
关于妊娠合并心脏病对胎儿的影响，哪项是正确的
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