某名牌白酒进货价为120元，其销售价为135元，其毛利率为（）。A.12.5%； B

  Some students believe that whether they have much money or large possessions, they will be happy. They believe that they will be able to do anything they wanted to do if they have money. Some students think that they should be good health, and enjoy whatever they like. Many students wish to have much wealth from their parents. In this way, they don’t have to work hardly and they can own everything. I don’t quite agree on the above points. I don’t think money means happy. We cannot buy much things with money, such as health, happiness and knowledge. I value knowledge, it makes me happy, for I can do a lot of for mankind with knowledge. Although different people value happiness differently, me wealth of happiness is in my study.

电力电缆线路主要由电力电缆、终端接头、中间接头及支撑件组成。电力电缆敷设有严格要求。下列关于电力电缆敷设要求的说法中，错误的是( )。

A．电缆穿过爆炸危险环境等级不同的区域之间的隔墙时，应当用非燃性材料严密堵塞

B．应当将电缆线路敷设在爆炸危险性较小的位置

C．直接埋地敷设的电缆可以采用有防腐措施的非铠装电缆

D．电缆进入电缆沟、建筑物、开关柜处应予封堵

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调节过程结束后，被控量的实际值与给定值之间的偏差称为动态偏差。

秦穆公请伯乐推荐继任者，伯乐说九方皋可堪此任。九方皋奉秦穆公之命外出寻找千里马，三月后复命说，马已找到。穆公问：何马也九方皋答道：黄色的公马。穆公派人去取马，取马的人回报说是匹黑母马。穆公不悦，责问伯乐：你推荐的这位相马者连马的黄黑公母都不辨，怎能鉴别其好坏伯乐答道：“若皋之所观，天机也。得其精而忘其粗，在其内而忘其外。见其所见，不见其所不见；视其所视，而遗其所不视。若皋之相者，乃有贵乎马者也。”马至，果千里之马。 这段话主要支持的观点是( )。

A．不能由马的颜色和性别来辨别千里马

B．马的颜色和性别是辨别千里马的关键

C．事物的本质是由其内因决定的

D．见其所见，不见其所不见是正确认识事物的关键