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听力原文: There was once a man who spent all his time in his glasshouse. Flowers was his name, and flowers were his main joy in life. He grew flowers of every color under the sun. He grew these flowers in order to enter them for competition. His greatest hope in life was to grow a rose of an entirely new color that would win him the silver cup for the Rose of the Year. Mr. Flowers' glasshouse was close to a public path, which was always used by children walking to and from school. Boys were often attracted to throw a stone or two at his glasshouse. So Mr. Flowers did his best to be in or close by his glasshouse at the beginning and end of the school day. However, it was not convenient or possible to be on guard all the time. Mr. Flowers had tried in many ways to prevent harm to his glasshouse, but nothing that he had done had been successful. Then, just as he was giving up hope of ever winning the battle, and of growing the Rose of the Year, he had a truly wonderful idea. He put up a large notice made of good, strong wood, some meters away from the glasshouse, where it could be clearly seen from the path. He had painted on the board the words: DO NOT THROW STONES AT THIS NOTICE. After this, Mr. Flowers had no further trouble. The boys were much more attracted to throw stones at the notice than at the glasshouse. (33)
A.
To grow beautiful flowers.
B.
To grow a rose of new color and win a prize.
C.
To grow all kinds of flowers in the world.
D.
To take part in the competition.
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【判断题】半圆或小于半圆的圆弧标注时应注写半径,尺寸线是从圆心开始指至圆弧的带箭头细线,半径数字前加注半径符号“R”。
A.
正确
B.
错误
【简答题】简述防腐的定义与主要的防腐方法。
【单选题】下列应注半径符号“R”的是________。I.整圆;II.大于半圆的圆弧;III.小于半圆的圆弧。
A.
Ⅰ+Ⅱ
B.
Ⅰ+Ⅲ
C.
Ⅱ+Ⅲ
D.
【单选题】圆的半径符号是( )
A.
r
B.
o
C.
Φ
D.
R
【简答题】某块大标语牌上要画如下图所示的三种标点符号:句号、逗号、问号。已知大圆半径R是小圆半径r的2倍,现分别给这些标点符号涂上油漆,若均匀用料,哪个标点符号的油漆用的多?为什么?
【单选题】34 下列应注半径符号“R”的是________。 I.整圆;II.大于半圆的圆弧;III.小于半圆的圆弧。
A.
Ⅰ+Ⅱ
B.
Ⅰ+Ⅲ
C.
Ⅱ+Ⅲ
D.
【单选题】标注尺寸时,圆的半径符号是( )
A.
Φ
B.
R
C.
SR
D.
【单选题】下列应注半径符号“R”的是() Ⅰ.整圆; Ⅱ.大于半圆的圆弧; Ⅲ.小于半圆的圆弧。
A.
Ⅰ+Ⅱ
B.
Ⅰ+Ⅲ
C.
Ⅱ+Ⅲ
D.
【单选题】下列应注半径符号 “R”的是 。
A.
整圆
B.
等于半圆的圆弧
C.
小于半圆的圆弧
D.
B+C
【单选题】下列应注半径符号“R”的是()
A.
整圆
B.
等于半圆的圆弧
C.
B+D
D.
小于半圆的圆弧
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