皮皮学，免费搜题
登录
搜题
【单选题】
Although many brands of gasoline are sold on Haibei island, gasoline companies there get all of the refined gasoline they sell from Haibei seaports only storage tank, which is always refilled with the same quality of gasoline. Therefore, the brands of gasoline for sale on Haibei may be different in name and price, bat they are identical in quality. The conclusion drawn above depends on which of the following assumptions?A.
Consumers are usually unaware of variations in the quality of the gasoline they buy unless those variations are announced by the gasoline companies.
B.
When tankers make gasoline delivery at Haibei' s seaport , the storage tank an Hailed always receives the same quantity of gasoline as that in the preceding delivery.
C.
There is a wide variation in the price at which the different brands of gasoline on Haibei are sold.
D.
If any gasoline company on Haibei alters the quality of its gasoline before sale, the other gasoline companies also use methods before sale that result in the same change in the quality of their gasoline.
E.
The gasoline storage tank on Haibei' s large enough to meet the needs of all of Haibei s different gasoline companies .
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】下列物质中所有原子都有可能在同一平面上的是
【单选题】抗生素治疗牙周病的原则是
A.
用于牙周基础治疗效果好的患牙
B.
用于急性感染的牙周疾病
C.
尽量使用抗需氧菌抗生素
D.
与特殊细菌有关的早发性牙周疾病
E.
尽量采用全身给药途径
【单选题】所有的物质都有质量,星云有质量,所以星云是物质。以下哪项与上述推理结构最为相似?
A.
所有物质都有质量,铜是物质,所以,铜有质量
B.
教授是博士,研究员不是教授,所以研究员不是博士
C.
所有的鸟都不是飞鱼,金枪鱼是鸟,所以金枪鱼不是飞鱼
D.
所有的鸟都是动物,人是动物,所以,人是鸟
E.
所有的物质都有质量,反物质不是物质,所以反物质没有质量
【多选题】下列关于电离能量损失率说法正确的有()。
A.
从物质角度来说，电离能量损失率也可叫做物质对带电粒子的阻止本领
B.
电离能量损失率随入射粒子速度增加而减小，呈平方反比关系
C.
电离能量损失率与入射粒子电荷数平方成正比，入射粒子电荷数越多，能量损失率就越大
D.
电离能量损失率与介质的原子序数和原子密度的乘积成正比
E.
高原子序数和高密度物质具有较大的阻止本领