语法与词汇
12.
Absurd random failures that plague automatic control systems are not A
merely
trivial aberrations; they are a reflection of the chaos B
which
results when design is C
assumed
to be D
primarily
a problem in mathematics.
A
B
C
D
【正确答案】
B
【答案解析】
which改为that。这里考查定语从句的用法，当先行词为主句的表语时，需要that引导。
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