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【简答题】人类发现了放射性同位素以后，很快便将它应用在生物学的研究中，为探明许多生命过程的奥秘起了很重要的作用。请回答： (1)如果用含 18 O的水浇灌某盆栽植物，并将该盆栽植物置于光照下。过一段时间，在植物周围的空气中，含 18 O的气态物质有______________。这些物质是由____________等(生理过程)产生的。 (2)如果用含 15 N的蛋白质饲料饲养体内不含 15 N的大白鼠，在饲...
【简答题】A．Chicken. B．Potato chips. C．Dessert. D．Drinks.
【简答题】CHIPS
【单选题】Which of the following was the Masterpiece of John Steinbeck?
A.
Tortilla Flat
B.
Of Mice and Men
C.
In Dubious Battle
D.
The Grapes of Wrath
【单选题】A tortilla chip manufacturer claims that, on average, they put 16.1 ounces of chips in each bag they produce. However, due to variations in chip size, the standard deviation of the weight of chips in...
A.
It is virtually impossible to get this result if the manufacturer is telling the truth.
B.
We cannot tell if the manufacturer is telling the truth since the sample size is only 40.
C.
The manufacturer may be telling the truth. The probability of a sample mean of 15.9 or less is 0.095.
D.
The manufacturer may be telling the truth. The probability of a sample mean of 15.9 or less is 0.284.
【简答题】A．Potato chips. B．Cola. C．Spinach. D．Cookies.
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