一般地,如果集合 A 中的任意一个元素都是集合 B 的元素,那么集合 A 叫做 集合 B 的子集,记作,读作“A 包含于 B”,或“B 包含于 A”。 如果集合 A 是集合 B 的子集,并且 B 中至少有一个元素不属于 A,那么集合 A 叫做集合 B 的真子集,记作,读作“A 真包含于 B”,或“B 真包含...
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B. & Singleton, V. L. Oxygen uptake by gallic acid as a model for similar reactions in wines. J. Agric. Food Chem. 37, 844–849 (1989). 23. Kachur, A. V., Koch, C. J. & Biaglow, J. E. Mechanism of copper-catalyzed autoxidation of cysteine. Free Radic. Res. 31, 23–34...
Irrational Number: The number which can't be represented in the form of fractions (in the form of {eq}\begin{align} \displaystyle \frac{p}{q} \end{align} {/eq} where q is not equal to zero). or which can't be represented in the form of ratio of two integers is known as irrat...
百度试题 结果1 题目已知正弦交流电u=5√2sin(100πt-π/6)V,则三要素是() A.5,100,pi;/6 B. 5radic;2,100pi;t,-pi;/6 C. -5radic;2,100pi;t,-pi;/6 D. 5,100pi;,-pi;/6 相关知识点: 试题来源: 解析 D 反馈 收藏
B. & Singleton, V. L. Oxygen uptake by gallic acid as a model for similar reactions in wines. J. Agric. Food Chem. 37, 844–849 (1989). 23. Kachur, A. V., Koch, C. J. & Biaglow, J. E. Mechanism of copper-catalyzed autoxidation of cysteine. Free Radic. Res. 31, 23–34...
在三相对称交流电路中,总的无功功率为()。 A. Q=√3ULILcosφ B. Q=√3ULILsinφ C. Q=&radic
dptoeβ1a2akapreowtheer of the prop- aa(z) = µ (z)aa(0) + ν (z)as† (0), (1) as† (z) = µ⁎ (z)as† (0) + ν⁎ (z)aa(0), (2) where μ(z) = cos(κz) + i(δ/κ)sin(κz), ν(z) = i(γP0/κ)sin(κz),...
一、挑选题 1、设集合{}{}{}1,2,3,4,5,1,2,3,2,5U A B ===,则()U A C B =I () A 、{}2 B 、{}2,3 C 、{}3 D 、{}1,3 2、已知集合{}{}0,1,2,2,M N x x a a M ===∈,则集合 M N I () A 、{}0 B 、{}0,1 C 、{}1,2 D 、{}0,2 3、函数()...
百度试题 结果1 题目单相桥式整流电路的输入电压u_2=10√2sinvtV时则输出电压平均值为() A. 20V B. 10V C. 9V D. 10radic;2V 相关知识点: 试题来源: 解析 C 反馈 收藏