Random意为:随意的,胡乱的,无目的的。与B项的 “不规律的抽查(Selecting…irregularly)”意思最接近。故选B项。A项“有目的检查学生的酒精含量。”与文中谈到的“青少年吸毒贩毒”不是一回事;C项“检测青少年罪犯是否吸毒。”检查的对象不是文中所讲的主要对象。D项“检查特殊的学生是否高兴”与文章主题相违背。
Working Life: What a Come-Down Could Random Drug Testing Cost You Your Job? Tobias Jones Investigates 来自 questia.com 喜欢 0 阅读量: 9 作者: T Jones 摘要: IF YOU ARE one of the millions of Britons who take Ecstasy on a Saturday night, or have the odd line of cocaine, or even ...
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How should I prepare for a drug test? No special preparations are necessary. Drug testing is often performed as an emergency test, on a random basis, or can be a scheduled test (for example, to meet ongoing employment requirements). Depending on the circumstances of the testing, you may be...
Working Life: What a Come-Down Could Random Drug Testing Cost You Your Job? Tobias Jones InvestigatesIF YOU ARE one of the millions of Britons who take Ecstasy on a Saturday night, or have the odd line of cocaine, or even just indulge in the occasional joint, you might be about to ...
Note:Even if you attempted to avoid any cannabis use for about 3-4 weeks, there is a chance of still failing a random drug test carried out for purposes such as probation, roadside checks, and even possible employment. Weed detox, use of zinc supplements, dilute your urine, and drinking ...
This type of population distribution curve is preferred over a non-normal distribution as the sample size is large, and the characteristics of the sample vary with its size. This requires adhering to the random sampling principle to avoid the researcher’s bias in interpreting the results. Anybia...
Next, assume 0.5% of people use the drug. If a person selected at random tests positive for the drug, the following calculation can be made to determine the probability the person is actually a user of the drug where the terms are: ...
Initial observation indicates that the drug is working. However, it is also possible that the observation may be due to chance. A t-test can be used to determine if the results are significant and applicable to the entire population, or whether they are random and not due to the drug inte...