他们对于这些题目都有疑问，
快来帮助他们吧

回答别人的问题，还能够进一步加深自己对题目和解决方案的理解。
利人利己何乐而不为呢？：）

[数学]DS-7f271kOG11th

A box contains only red chips, white chips, and blue chips. If a chip is randomly selected from the box, what is the probability that the chip will be either white or blue?

(1)The probability that the chip will be blue is

(2)The probability that the chip will be red is

5243人做过-12条讨论

小小的大太阳 1773天前
提问 为啥这题不考虑数量呢？每个颜色的数量不定的话，相对应的概率也不同？比如：1红1白2蓝 p就不是三分之一了。。。想不通求教
回复

[数学]DS-892vvkGWD

Is x ＜ 0 ?

(1)

(2)

5059人做过-28条讨论

大米要考750 2164天前
提问 答案不对吧… 至少第一个不对…怎么能推出x<0呢 X大于零也成立啊…如果X是1/2呢…
回复

[数学]DS-693zakManhattan

If u is a multiple of prime number is u a multiple of ?

1. v<6

2. u = 42

2774人做过-21条讨论

phoebefighting 2534天前
提问 multiple在这里是乘积还是倍数的意思啊，感觉第一个像乘积，第二个像倍数，题目读不懂
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小葱Lc 4409天前
提问 不懂得 什么意思啊 觉得都不对啊
回复

[阅读]RC-5b1lbk

In the context of the passage, the phrase "fossils of a predicted kind" (highlight) most likely refers to which of the following?

7425人做过-17条讨论

banny静 2591天前
提问 没有解答呀？
回复
leehw 4462天前
提问 But investigators have now uncovered bones that evidently belong to nonavian maniraptors "dating to the time of Archaeopteryx".

Not just Theropod fossils belonging to Archaeopteryx, but the fossils dating to the time of it.
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[数学]DS-8dgvck其它

1/X<1/X^3 ?

(1) X>0

(2) X<1

247人做过-2条讨论

karios 2676天前
提问 不是c？
回复

[逻辑]CR-ae7zkhGWD

Ecologist: The Scottish Highlands were once the site of extensive forests, but these forests have mostly disappeared and been replaced by peat bogs. The common view is that the Highlands' deforestation was caused by human activity, especially agriculture. However, agriculture began in the Highlands less than 2,000 years ago. Peat bogs, which consist of compressed decayed vegetable matter, build up by only about one foot per 1,000 years and, throughout the Highlands, remains of trees in peat bogs are almost all at depths great than four feet. Since climate changes that occurred between 7,000 and 4,000 years ago favored the development of peat bogs rather than the survival of forests, the deforestation was more likely the result of natural processes than of human activity.

In the ecologist's argument the two portions in boldface play which of the following roles?

12602人做过-16条讨论

Martini0 2681天前
提问 为什么C不对呀。
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[数学]PS-2234bkOG13th

At a supermarket John spent of his money on fresh fruits and vegetables, on meat products, and on bakery products. If he spent the remaining $6 on candy, how much did John spend at the supermarket?

5942人做过-3条讨论

dannynidandong 2687天前
提问 1-1/2-1/3-1/10=1/15，这个1/15应该是candy所占的比率。为什么求在超市花费的总数可以用candy的价格*candy的比率？好奇怪。
回复

[阅读]RC-8egnukCourseReading

The author of the passage is primarily concerned with

419人做过-1条讨论

muffinv 2691天前
提问 为什么A选项是不正确的？
回复

[语法]SC-bbgefk其它

Prices at the producer level are only 1.3 percent higher now than a year ago and are going down, even though floods in the Midwest and drought in the South are hurting crops and therefore raised corn and soybean prices.

3842人做过-2条讨论

xu22313 2745天前
提问 B选项的those不应该用they吗？感觉应该是特指而非泛指，因为一年前的生产者价格和一年后的生产者价格不是同一个主体吗？
回复

[阅读]RC-e3gk7kCourseReading

It can be inferred from the passage that the most recent feminist social science research on women and class seeks to do which of the following?

1366人做过-1条讨论

Zhennanw 2746天前
提问 为什么选d呢？
回复

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