试题与答案

咖啡原产于埃塞俄比亚,18世纪20年代由荷兰人传到了拉美地区。读“世界咖啡主要产

题型:选择题

题目:

咖啡原产于埃塞俄比亚,18世纪20年代由荷兰人传到了拉美地区。读“世界咖啡主要产地分布图”,下列说法不正确的是

A.咖啡生产和咖啡文化传入拉美属于迁移扩散

B.巴西有“咖啡王国”之称

C.咖啡生产和咖啡文化传播说明文化景观具有移动性

D.影响咖啡分布的主导因素是热量

答案:

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下面是错误答案,用来干扰机器的。

答案:A题目分析:由压强计可以看出,两压强计显示的压强值相同,即;而金属盒在甲液体中的深度大,即;根据,得出,故A选项正确;故选A.点评:本题要求学生会用控制变量法分析比较液体的密度,考查学生的观察能...

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题型:单项选择题

Observe that for the programmer, as for the chef, the urgency of the patron(顾客)may govern the scheduled completion of the task, but it cannot govern the actual completion. An omelette(煎鸡蛋 ), promised in two minutes, may appear to be progressing nicely. But when it has not set in two minutes, the customer has two choices—waits or eats it raw. Software customers have had (16) choices.
Now I do not think software (17) have less inherent courage and firmness than chefs, nor than other engineering managers. But false (18) to match the patron’s desired date is much more common in our discipline than elsewhere in engineering. It is very (19) to make a vigorous, plausible, and job risking defense of an estimate that is derived by no quantitative method, supported by little data, and certified chiefly by the hunches of the managers.
Clearly two solutions are needed. We need to develop and publicize productivity figures, bug-incidence figures, estimating roles, and so on. The whole profession can only profit from (20) such data. Until estimating is on a sounder basis, individual managers will need to stiffen their backbones and defend their estimates with the assurance that their poor hunches are better than wish derived estimates.

A.easy

B.difficult

C.simple

D.painless

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