某小型工件需加工φ12mm的孔,常用()机床加工。A、立式钻床 B、车床 C、台式钻

题型:单项选择题

问题:

某小型工件需加工φ12mm的孔,常用()机床加工。

A、立式钻床

B、车床

C、台式钻床

D、铣床

考点:井下作业工井下作业工技师井下作业工技师题库
题型:单项选择题
先化简,再求值:(x+3)2+(x+2)(x-2)-2x2,其中x=-
1
3
题型:单项选择题

下列叙述中正确的是 ______。

A.在窗体的Form_Load事件过程中定义的变量是全局变量

B.局部变量的作用域可以超出所定义的过程

C.在某个Sub过程中定义的局部变量可以与其他事件过程中定义的局部变量同名,但其作用域只限于该过程

D.在调用过程中,所有局部变量被系统初始化为0或空字符串

题型:单项选择题
任务型阅读(共两节,满分35分)
A Journey of Discovery
The Adventures of Huckleberry Finn by Mark Twain is one of the most famous American novels.
Published in 1884, it was one of the first novels in the USA written in common, everyday language. For example, using non-standard English, Twain wrote, ‘I haven’t got no money,’ to mean ‘I do not have any money’. In this way, Twain made his characters very true to life.
The story is told by Huckleberry Finn, called Huck for short, who runs away to escape his abusive father. At first, Huck goes to a small island in the middle of the Mississippi River. There, he finds Jim, a black slave who has run away to escape slavery. The two of them stay on the island for a few weeks and become friends, but they must leave because Huck learns that people are looking for Jim. They decide to travel on a raft on the Mississippi River to reach the Ohio River, which will take them north to a state that does not allow slavery.
During their journey, Huck and Jim visit many places along the river and meet many different people. Unfortunately, most of the people they meet are not good. For instance, Huck and Jim meet a family, the Grangerfords, who have been fighting with another family, the Shepherdsons, for so many years that nobody remembers how the fight began. While Huck stays with the Grangerfords, the fighting starts again, and several members of both families are killed. Lat6r, Huck and Jim meet the King and the Duke, two men who take control of their raft and make money by tricking people. During the confusion following one of these tricks, Huck and Jim escape with their raft.
Although the people Huck and Jim meet are bad, they are also funny. Mark Twain used humour to show readers the problems of American society in the t800s. More importantly, despite all of the bad things that happen to Huck and Jim, the novel has a happy ending for both of them. Jim gets his freedom because his owner has died and set him free in her will, and Huck learns that his father has died, so he is also safe.
The Aclventures of Huckleberry Finn is an adventurous and humourous story, and it teaches modern readers a lot about American society in the 1800s.
The passage
The passage ‘A journey of discovery’ is a brief (71) _______ to the novel The Adventures of Huckleberry Finn by Mark Twain, which (72)________ out in I884.
The novel
The Adventures of Huckleberry Finn, one of the most famous American novels, is an adventurous and humorous story. The novel was (73) __________ in America in the 1800s, when slavery existed. In the novel Mark Twain used common and everyday language to make his characters very true to life and used humour to (74) _________ readers the problems of American society in the 1800s.
The main
(75) _______
Huck fled his father and settled himself on an island in the Mississippi River, (76) __________ he met Jim and made friends with him.
(77) ___________ that people were looking for Jim, they decided to travel to a northern state that did not allow slavery.
During the journey, Huck and Jim visited many places and met many different people.
Though many of the people they met were not good, they (78) ____________.
Conclusion
Modern readers can learn a great (79) ____________ about American society in the 1800s from Huck and Jim’s adventures during their journey to (80) ____________
题型:单项选择题

用电压表测得某交流电源电压为100V,那么该电压最大值为()

A.200V

B.100V

C.173V

D.141V

题型:单项选择题

二氧化碳灭火系统控制面板灭火指示区自动灯/键:()

A、电磁阀动作后,释放开关也闭合,否则,表示释放开关未动作

B、表示其处于“自动”状态,当火气系统送来的信号符合逻辑关系时,自动进行联动灭火控制

C、表示其处于“手动”状态,当火气系统送来的信号符合逻辑关系时,不自动进行联动灭火控制

D、在灭火设备启动前有一段延时时间,其间该灯亮

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