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【简答题】

Many objects that people use each day started with a 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 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. 小题1: A.study B.live C.sleep D.walk 小题2: A.easily B.correctly C.carefully D.normally 小题3: A.article B.aim C.idea D.action 小题4: A.so B.and C.but D.as 小题5: A.spell B.read C.write D.change 小题6: A.look B.see C.watch D.find 小题7: A.place B.desk C.book D.hand 小题8: A.marked B.prepared C.cut D.invented 小题9: A.books B.pencil C.design D.eraser 小题10: A.wonderful B.expensive C.colourful D.common

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题目标签:凹槽
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参考解析:
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【单选题】海蚀凹槽通常形成于()。

A.
浅海带
B.
潮上带
C.
潮间带
D.
半深海带

【单选题】海蚀凹槽通常形成于()。

A.
浅海带
B.
潮上带
C.
潮间带
D.
半深海带