单项选择题 下列四组视图中,主视图均为全剖视图,其中( )的主视图有缺漏的线。A. B. C. D.

单项选择题 A、偶函数，无界 B、非奇非偶函数，无界 C、奇函数，无界 D、奇函数，有界

多项选择题 Why did Mr. Long Yongtu get so angry? A.He thought the US negotiator was unfriendly to him. B.He thought the US negotiator insulted the Chinese people. C.He thought the US negotiator questioned the quality of Chinese pork. D.He thought the US negotiator rejected the agreement in a rude way.