问题
单项选择题
麻黄、香薷均具有的功效是( )
A．羌活
B．荆芥
C．防风
D．白芷
E．紫苏
答案
参考答案：A
搜题请搜索小程序“爱下问搜题”
麻黄、香薷均具有的功效是( )
A．羌活
B．荆芥
C．防风
D．白芷
E．紫苏
参考答案：A
Many objects that people use each day started with a simple idea. These objects have often changed the way we 46 . Some help us to do a job more 47 . Others fill a need or solve a problem. In 1858, Lipman had such an 48 . He took out a pencil, a piece of paper, 49 an eraser. Then he began to write. Sometimes he needed to 50 a word. Each time he had to search under his books and papers to 51 the eraser. “ I wish my eraser would stay in one 52 !” he said. Then Lipman had his simple idea. He 53 a groove(凹槽) in one end of the pencil. He glued(粘牢) the eraser into the groove. Lipman had solved his problem. Later he thought that others might like to have such a pencil. So he sold his 54 .Some pencils with erasers were 55 . His design earned $ 100000.
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