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多边形内角和公式:如果n多边形有n条边,那么这个n多边形所有内角度数和是?
组合数公式:以下哪个是正确的组合数的计算公式?
维度六:解题思维

What is the tens digit of $$21^{(3^{50})}$$?
维度二:逻辑能力

Holston characterized a colonial situation as an aggregation of activities and a conjunction of outcomes that, though _____ and at times coordinated, were usually diffuse, disorganized, and even contradictory.
Which of the following numbers CANNOT be the value of $$\frac{a}{|a|}+\frac{b}{|b|}+\frac{c}{|c|}$$, where $$a$$, $$b$$, and $$c$$ are nonzero numbers?
The integers $$s$$, $$t$$, and $$u$$ are each greater than $$1$$.

Quantity A

The average (arithmetic mean) of $$s$$, $$t$$, $$u$$, $$\frac{1}{s}$$, $$\frac{1}{t}$$, and $$\frac{1}{u}$$

Quantity B

$$1$$


Which of the following can be inferred about the "Oldowan artifacts" mentioned in the passage?
The author mentions Kombewa "flake tools" most likely in order to argue that
维度二:逻辑能力

Holston characterized a colonial situation as an aggregation of activities and a conjunction of outcomes that, though _____ and at times coordinated, were usually diffuse, disorganized, and even contradictory.
Although New York exhilarated him, even at first Leger's reaction to it was not _____: he was initially bothered by its stunning verticality.
As he has matured as a scholar, Felmar has come to see the merit of qualification. His conclusions, which early in his career he (i)______, are now often (ii)______.
The (i)______ current-generation solar cells are (ii)______: although experimental cells have reached efficiencies greater than 40 percent, most commercially available cells in the early part of the twenty-first century still struggle to get past about 20 percent.

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