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举一反三
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- 【单选题】CO 2 的如下振动中,何种属于非红外活性振动 (1) ← → (2) →← → (3) ↑ ↑ (4 ) O = C = O O = C = O O = C = O O = C = O ↓ A. 1 B. 2 C. 3 D. 4
- 点(1, 2, 3)关于坐标原点O对称的点的坐标为( ) A: (-1, -2, -3) B: (-1, -2, 3) C: (1, 2, -3) D: (1, 2, 3)
- 呼吸链中细胞色素排列顺序是:A.()b()→()c()→()c()1()→()a()→()a()3()→()O()2B.()c()→()b()→()c()1()→()a()→()a()3()→()O()2C.()c()1()→()c()→()b()→()a()→()a()3()→()O()2D.()b()→()c()1()→()c()→()a()→()a()3()→()O()2E.()c()→()c()1()→()b()→()a()→()a()3()→()O()2
- 以下哪个点与坐标原点O的距离最近？( ) A: (0, 1, 2) B: (1 ,2, -2) C: (3, 2, 1) D: (2, 0, 3)