搜题请搜索小程序“爱下问搜题”
问题 解答题

某大学生到“美丽”化妆品公司去应聘，该公司每月支付给销售人员的工资有两种方案，方案一：保底工资350元，每销售一件提成5元；方案二：无保底工资，每销售一件提成12元．

（1）设两种方案的月工资分别为y1元、y2元，月销售量为x件，分别求y1、y2与x的函数关系式；

（2）对该大学生的选择，你有何建议？

答案

解：（1）根据题意得 y1=350+5x； y2=12x．

（2）当y1=y2即 350+5x=12x 时，x=50．

所以当销量为50件时，选择任一方案都一样；

当y1＞y2即 350+5x＞12x 时，x＜50．

所以当销量少于50件时，选择方案一；

当y1＜y2即 350+5x＜12x 时，x＞50．

所以当销量大于50件时，选择方案二．

单项选择题

如图，2010年2月11日，国际奥委会在加拿大温哥华召开的第122次全会上，中国城市南京在投票表决中战胜欧洲古城波兰的波茨南，成功获得第二届青年奥运会的举办权。为迎接青奥会，某中学同学准备在校园网上创办一个与南京历史相关的图片网站。请你审核下列有关图片的解说词，其中准确的是（）

A、图l：1842年，中英《南京条约》签订，加深了中国半殖民地半封建化程度

B、图2：1853年，颁布《天朝田由制度》，提出了在中国发展资本主义的设想

C、图3：1945年，日本投降，结束了中国近代百年来屈辱的历史

D、图4：1949年，人民解放军占领南京，覆灭了统治中国22年的国民政府
查看答案
单项选择题

Most plants can make their own food from sunlight, (1) some have discovered that stealing is an easier way to live. Thousands of plant species get by (2) photosynthesizing, and over 400 of these species seem to live by pilfering sugars from an underground (3) of fungi(真菌). But in (4) a handful of these plants has this modus operandi been traced to a relatively obscure fungus. To find out how (5) are (6) , mycologist Martin Bidartondo of the University of California at Berkeley and his team looked in their roots. What they found were (7) of a common type of fungus, so (8) that it is found in nearly 70 percent of all plants. The presence of this common fungus in these plants not only (9) at how they survive, says Bidartondo, but also suggests that many ordinary plants might prosper from a little looting, too.

Plants have (10) relations to get what they need to survive. Normal, (11) plants can make their own carbohydrates through photosynthesis, but they still need minerals. Most plants have (12) a symbiotic relationship with a (13) network of what are called my corrhizal fungi, which lies beneath the forest (14) . The fungi help green plants absorb minerals through their roots, and (15) , the plants normally (16) the fungi with sugars, or carbon with a number of plants sharing the same fungal web, it was perhaps (17) that a few cheaters—dubbed epiparasites—would evolve to beat the system. (18) , these plants reversed the flow of carbon, (19) it into their roots from the fungi (20) releasing it as "payment.\

8（）

A.popular

B.common

C.ordinary

D.widespread
查看答案