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(六选二) An abundance of nutrient-rich pollution in estuaries causes algae to _____________, much as houseplants grow better when their soil contains added fertilizer.
The function $$f$$ is defined for all numbers $$x$$ by $$f(x) = 2+ 3x$$.

Quantity A

$$f(x+4)-f(x)$$

Quantity B

12


For all integers $$k \gt 1$$, $$P_{k}=\frac{k+1}{k}$$. For all integers $$k \gt 2$$, $$b_{k}=P_{k}-P_{k-1}$$. The integer $$n$$ is greater than $$2$$.

Quantity A

$$b_{n}$$

Quantity B

$$\frac{-1}{n^2-n}$$


Which statement best expresses the author' s main conclusion in the passage?
According to the distribution shown above, which age-group contains the median age of Internet users?
A furniture store purchased sofas for a wholesale price of $400 each and sold most of them for a retail price of $560 each. In a summer sale, the retail price of the last few sofas was reduced by $$x$$ dollars, and they were sold at this reduced price. The store's profit from selling the last sofa was more than 15 percent of its wholesale price. Which of the following could be the value of $$ x$$ ?

Indicate all such values.
According to the passage, which of the following describes the treatment of Greco-Roman paganism and Germanic paganism by Latin Christianity?
The passage's discussion of "free time" suggests that
It can be inferred from the passage that most nineteenth-century researchers of the Arctic would have agreed with which of the following about the "distinct sounds” ?
The effect of the distant past on an individual' s financial decisions ____________ much more slowly than the authors of the study had expected, with the impact of events early in life persisting decades into the future.
The indigenous uprising in Bolivia in 2008 was not_____________: in 1781 indigenous people took over the area near present-day La Paz in what constituted the biggest challenge to the Spanish who then controlled Bolivia.
The list price of a certain book is $$k$$ dollars. After the list price of the book is discounted by $$p$$ percent, the resulting price is $$n$$ dollars.

Quantity A

$$k$$

Quantity B

$$n+ \frac{pk}{100}$$


According to the passage, the boxes of public opera houses served to
It can be a daunting task to plunge into the disparate and extensive data sets on the carnivores and _____________ meaningful patterns from their extraordinary morphological, behavioral, and ecological diversity.
Historically, it has been unusual for scientific terms, once coined, to enter common usage with much_____________: "scientist" and "dinosaur"(coined in 1833 and 1842,respectively), for instance, were rarely used before the late nineteenth century.
When Jourdain(i)_____________ that the "phonograph has been as disastrous to the development of the musical imagination as television has been to the literary imagination," he appears grumpy rather than reflective. (ii)_____________ the fact that there are arguably as many fine authors and poets now as ever, television notwithstanding, there is not a shred of evidence that musical recordings have had any(iii)_____________ effect on music in any way.
History is about recognizing continuities and therefore the historian must (i)_____________ stories that rope together the disparate worlds of past and present. But it is also true that honest history arises from a sense of (ii)_____________. lt is the experience of discontinuity that alerts us to the(iii)_____________ of the past and sets us looking for narratives to capture that unfamiliar entity.
Epidemiological studies have found that occasional tea drinkers, and those who avoid tea altogether, do not reap the benefits of lowered risk ofheart attack that those who _____________ the brew do.
When the integer $$n$$ is divided by 33, the remainder is 18. Which of the following must be a divisor of $$n$$?
If $$M=(3,875)^2+(5,843)^3$$, then the units digit of $$M$$ is

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