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单项选择题

当采用水泥、石灰等材料作为沥青混合料填料时,其用量不宜超过矿料总量的（ ）。

A.1%
B.2%
C.3%
D.4%
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单项选择题
As a boy I dreamed of flying airplanes. 　21　 I told Dad I wanted to be a pilot, he said, "You need to do your job well on the farm first, and 　22　 you may realize your dream." The farm was an everyday responsibility（职责）－that 　23　 Saturday, Sunday and Christmas too. Every morning I got up at four o' clock to milk and 　24　 the cows. After the milk was bottled, my older brothers and I 　25　 it to people' s homes. I was paid five cents a bottle. At that time I 　26　 that to be successful you have to take care of your responsibilities.
When I was 16, I signed up for flying lessons. To pay for the lessons I 　27　 a small restaurant with some friends. One of our regular 　28　 was the president of the Farmers Bank. Every 　29　 I got, l talked to him about my dream. One day I told him I 　30　 $3, 500 to buy my own 　31　. He lent me the money so that I could fly people within 150 miles of the airport.
Twelve years later I was flying people around the world 　32　 a pilot of a big airline company. After ten years in the company I started my own 　33　.
Today I run a billion-dollar company, but it was on the farm that I learned the principles（原则）that have 　34　 me. Hard work and determination do 　35　 dreams come true.
____.
A.Before
B.When
C.Since
D.Though
未知题型
假设你是李华，请用英语写一封信邀请Mike参加你和朋友在颐和园的周末野餐，并告诉他你将负责面包、水果和饮料。具体安排如下：
英语,历年真题,2014年专科成人高等考试《英语》（高升专）真题
Yours,
Li Hua
不定项选择
阻碍红十字会工作人员依法履行职责的，可依法给予治安管理处罚和追究其刑事责任。
A．错误
B．正确
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