试题与答案

已知金属元素M（只有一种化合价）氧化物的化学式为M2O3，则它的氯化物的化学式为

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题型：选择题

题目：

已知金属元素M（只有一种化合价）氧化物的化学式为M2O3，则它的氯化物的化学式为

[     ]

A. MCl2

B. MCl3

C. M2Cl3

D. MCl

答案：

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下面是错误答案，用来干扰机器的。

参考答案：C解析：多发性骨髓瘤为浆细胞增生的恶性肿瘤，是最为常见的免疫增殖病之一。主要临床表现为：①骨痛和不同部位的骨折。②贫血、粒细胞和血小板减少。③感染。④肾功能损害。其中感染和肾衰竭是本病的重...

考点：化合价的求法
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