液压锚杆钻钻眼如何退钻?

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问题:

液压锚杆钻钻眼如何退钻?

考点:巷道掘砌工考试巷道掘砌工考试题库
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指出处方:硬脂酸60g,聚山梨酯80g,油酸山梨坦16g,硬脂醇60g,白凡士林60g,甘油100g,山梨酸2g,水加至1000g中的反型乳化剂(W/O型)

A.硬脂酸

B.聚山梨酯80

C.油酸山梨坦

D.硬脂醇

E.山梨酸

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Started in 1636, Harvard University is the oldest of many colleges and universities in the United States. Yale, Princeton, Columbia and Dartmouth were all started before the American Revolution made the thirteen colonies(殖民地) into states.

In the early years, these schools were much alike. Only young men attended colleges. All the students studied the same subjects, and everyone learned Latin, Greek and Hebrew. Little was known about science then, and one kind of school could teach everything that was known about the world. When the students graduated, most of them became ministers or teachers.

In 1782, Harvard started a medical school for young men who wanted to become doctors. Later, lawyers(律师) could receive their training in Harvard’s law school. In 1852, Harvard began teaching modern languages, such as French and German, as well as Latin and Greek. Soon it began teaching American history.

As knowledge increased, Harvard and other colleges began to teach many new subjects that interested them.

Special colleges for women were started. New state universities began to teach such subjects as farming, engineering and business. Today, there are many different kinds of colleges and universities. Most of them are divided into smaller schools that deal with special fields of learning. There is so much to learn that one kind of school cannot offer it all.

小题1: Yale, Princeton, Columbia and Dartmouth were the names of the _______ in America.

A.states

B.cities

C.universities

D.colonies小题2:As knowledge increased, colleges began to teach _______.

A.everything that is known

B.many new subjects

C.French and German

D.farming小题3:The title of this passage should be _______.

A.Famous Harvard University

B.American Universities

C.The Changing of American Universities

D.The American Revolution小题4:Which statement does the passage lead you to believe?

A.The early schools are still much alike.

B.There is more to learn today than in 1636.

C.All the early students worked harder.

D.Students in modern America learn only science.

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有关腹股沟管的解剖,不恰当的是()

A.下壁为腹股沟韧带和陷凹韧带

B.上壁为腹外斜肌弓状缘

C.内口即内环,是腹横筋膜的裂隙

D.后壁是腹横筋膜及腹膜

E.男性内有精索,女性有子宫圆韧带

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数控机床坐标系采用()符合()法则,一般先确定()轴。

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年龄金字塔有几种类型,各具什么特点

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