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单选题
960、Make sure that the warning light comes on in less than 3 seconds.
A
Make sure that the warning light is turned on in no more than 3 seconds.
B
Make sure that the warning light turns on within 3 seconds.
C
Make sure that the warning light is on for at least 3 seconds.
答案解析
正确答案：B
解析：
解析:less than 少于,不到;no more than 至多,不超过。within 在(某段时间)之内。at least 不少于,至少。
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