LD催化乳酸生成丙酮酸的反应较适当的pH是()
A.10.5
B.9.0
C.7.6
D.7.0
E.4.6
参考答案:B
Some researchers believe that there is no doubt _____ a cure for AIDS will be found. [ ]
A. which
B. what
C. that
D. whether
同时扔两个正常的骰子,即各面呈现的概率都是1/6,若点数之和为12,则得到的自信息为()。
A.-log36bit
B.log36bit
C.-log(11/36)bit
D.log(11/36)bit