With the conditions constantly changing, the result of the exper

With the conditions constantly changing, the result of the experiment is not always _____________.
A、changeable
B、reliable
C、reasonable
D、variable
【正确答案】：B
【题目解析】：A项：多变的；B项：可靠的；C项：合理的；D项：多样的；这句话的意思是：随着条件不断变化，饰演的结果也不是总是可靠的，B项符合题意。