【官方】SAT语法每日一题附答案和解析(2018年1月31日)

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The creation of today’s animated films, frequently hailed for their lifelike

artistry, 1 relies heavily on mathematics. Animators use algorithms, or

sequences of mathematical steps, to create, for instance, the rounded shapes

making up an old man’s knobby knuckles or a young girl’s bouncy hair. One of the

algorithms now considered an industry standard repeatedly subdivides a polygon

by splitting and averaging the midpoint of a line. Developed by Pixar Animation

Studio’s Tony DeRose, this algorithm eliminated the problem of discernible edges

of polygons by replacing them with the seamlessly rounded curves of the

parabolas that emerge as a result of the polygon subdivision process.

Innovations such as DeRose’s depend on an understanding of applied mathematics

in areas such as geometry, linear algebra, trigonometry, and calculus.

Select an Answer

Answer

A

NO CHANGE

Answer

B

have relied

Answer

C

are relying

Answer

D

rely

答案与解析：A

A

NO CHANGE

EXPLANATION

Choice A is the best answer because the singular verb “relies” maintains

agreement with the singular subject “creation.”

EXPLANATION

Choice B is incorrect because the plural verb “have relied” results in a lack

of agreement with the singular subject “creation.”

EXPLANATION

Choice C is incorrect because the plural verb “are relying” results in a lack

of agreement with the singular subject “creation.”

EXPLANATION

Choice D is incorrect because the plural verb “rely” results in a lack of

agreement with the singular subject “creation.”