正确答案: B

病因治疗

题目：对于代谢性酸中毒的患者，下列治疗中最关键的是

解析：B

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学习资料的答案和解析：

[单选题]Passage FourMillions of stars are traveling about in space. A few form. groups which journey together, but most of them travel alone. And they travel through a universe so large that one star seldom comes near to another.

moving about without a fixed course

解析：

46．答案为D  根据第一段可知恒星的运动是没有规律的。

[单选题]下列有关沙土类土壤的叙述不正确的是( )

土壤黏性大