2. 外语
  3. It is important in scientific experiments that the chemicals should be kept at a(n)______temperature of 40 degrees.

It is important in scientific experiments that the chemicals should be kept at a(n)______temperature of 40 degrees.

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问题 It is important in scientific experiments that the chemicals should be kept at a(n)______temperature of 40 degrees.
选项 A、constant
B、equal
C、same
D、definite
答案A
解析 constant a．始终如一的，不变的；不断的，连续发生的；忠实的(朋友)(如：He’s been constant in his devotion to scientific studies．)。equal(to)a.相等的，同样的：平等的；胜任的。samea.相同的，一样的(same必须与the连用)。definite a.明确的，确切的；肯定的。
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