混凝土泵车就是自行式的混凝土泵，它能以载重汽车的速度行驶到浇_爱下问搜题

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问题填空题

混凝土泵车就是自行式的混凝土泵，它能以载重汽车的速度行驶到浇灌混凝土的地点，利用车上的布料装置，在混凝土工程中进行（）。

答案

参考答案：直接浇灌作业

单项选择题 A3/A4型题

奶牛产后65天内未见明显的发情表现，直肠检查卵巢上有一小的黄体遗迹，但无卵泡发育，卵巢的质地和形状无明显变化。与该病无关的病因是（）

A.子宫疾病

B.急性 * * 炎

C.气候不适应

D.饲养管理不当

E.维生素A缺乏

完形填空

Robeson was born in a very poor family. At seven, he had to pick coal in a deserted mine near his home, then he sold   1  he had picked and earned a few coins to help his parents. He had   2  schooling, for being so poor, how could they   3  school fees?
When he was fifteen, he worked   4  a servant in a school. Looking at other children studying in the classroom, he felt   5  for himself. How he  6  to have the same chance! He decided to study by  7 . In the daytime, after the sweeping and cleaning was over, he   8  stand by the window outside the classroom trying to catch what the teacher said. At night, he tried his best to remember what he 9   during the day. He worked  10  hard at his lessons that he sometimes had just three or four hours to sleep. The more he learned, the greater   11  he showed in his lessons. A maths teacher discovered him and came to like this diligent boy and  12  him to sit at the back of the class. In one exam, he was the   13   one in the whole school who reached the highest grade. He would have been given the scholarship if he   14   a regular student of the school.
Robeson   15  through six long years with his study of maths and wrote several articles which captured the   16  of some university professors. They admired his talent   17  his diligence. To give him a good chance, they hired him as a librarian and   18   him free guidance. Robeson felt   19 , for he was sure that before him there was a broad road  20  success.

A．the teacher

C．his parents

D．his schoolmates

A．had learned

B．has been taught

D．had been written down

B．according to

D．in spite of

D．disappointed

B．coming from

D．covered with