题目内容

与红细胞成熟有关的维生素是

A. 维生素B₁和遍多酸
B. 维生素B₁₂和叶酸
C. 维生素B₆和叶酸
D. 遍多酸和叶酸

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The word "display" in line 17 is closest in meaning to（）

A. communicate
B. imitate
C. initiate
D. exhibit

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In western North America （） form the Great Divide, which separates the areas from which waters flow either eastward to the Atlantic or westward to the Pacific.

A. the Rocky Mountains
B. where the Rocky Mountains
C. the Rocky Mountains in which
D. there are the Rocky Mountains

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According to paragraph 3, which of the following is most important for an effective survey（）

A high number of respondents
B. Carefully worded questions
C. An interviewer's ability to measure respondents' feelings
D. A sociologist who is able to interpret the results

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(Heat) exhaustion is (causing) by excessive (loss) of body (fluids) and body salts.（）

A. Heat
B. causing
C. loss
D. fluids

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与红细胞成熟有关的维生素是

A. 维生素B1和遍多酸 B. 维生素B12和叶酸 C. 维生素B6和叶酸 D. 遍多酸和叶酸

The word "display" in line 17 is closest in meaning to（）

In western North America （） form the Great Divide, which separates the areas from which waters flow either eastward to the Atlantic or westward to the Pacific.

According to paragraph 3, which of the following is most important for an effective survey（）

(Heat) exhaustion is (causing) by excessive (loss) of body (fluids) and body salts.（）

A. 维生素B₁和遍多酸
B. 维生素B₁₂和叶酸
C. 维生素B₆和叶酸
D. 遍多酸和叶酸