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问题 单项选择题

红外线动态检测车评判地面站磁钢对轴距的测量，在轴距大于3m时，误差（）为合格。

A.≤︱±2%︱

B.≤︱±5%︱

C.≥︱±15%︱

D.≤︱±10%︱

答案

参考答案：D

单项选择题

The following data sufficiency problems consist of a question and two statements, labeled (1) and (2), in which certain data are given. You have to decide whether the data given in the statements are sufficient for answering the question. Using the data given in the statements plus your knowledge of mathematics and everyday facts (such as the number of days in July or the meaning of counterclockwise), you must indicate whether.

If ab≠0, is c an integer ？（）
(1) c=5a-2b
(2) a=2b

A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.

B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.

C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.

D. EACH statement ALONE is sufficient.

E. Statements (1) and (2) TOGETHER are NOT sufficient.
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问答题 简答题

简述牛用微生物制剂的种类和作用。
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