（）焊接工艺存在高频电磁场辐射有害因素 A.电焊 B.氩弧焊 C.熔化焊

欢欢在读22022000时一个0也不用读．______．（判断对错）

We are all ________ at the ________ story.[ ]

A. exciting; exciting

B. excited; exciting

C. exciting; excited

D. excited; excited

After students come home from a tiring day at school, they tend to worry a lot about their homework.

Whether students are working on English or chemistry homework, they are simply working on the assignment in order to get it done, attempting to memorize the concepts for the time being and do not absorb any of the information afterward. Students are wasting their time on insignificant assignments rather than effectively using that time to achieve other accomplishments. According to www.dailymail.com, many parents are concerned that homework is being assigned rather than being used to integrate (整合) what teachers are covering in the classroom. In their eyes, if less homework is assigned, students would have much less stress and could focus more on their passions and hobbies.

Homework gets in the way of participating in community service events as well as opportunities for getting a job or being a part of an extra-curricular activity. These responsibilities are important for teenagers to take on because they prepare the teenagers for the "real world." Without the proper exposure to work that is not school related, students will find themselves lost after they graduate. If homework were no longer given, students would have a lot more time to mature in other fields rather than being educated only on academics.

In spite of the fact that teachers want students to do better on tests and absorb the material that they are teaching, homework is not accomplishing its purpose. Because school is becoming increasingly more competitive and challenging, homework is becoming a setback rather than extra practice. Its removal would benefit the well being of teenagers as well as encourage them to get out in the "real world" and discover themselves instead of staring at a pile of assignments.

小题1:Students are wasting their time on insignificant homework because

A．they are working on it carelessly and hurriedly

B．they attempt to get only part of the information memorized

C．they spend too much time doing it without understanding

D．they fail to take in the information after finishing it小题2:Many parents think that teachers should ______.

A．help students integrate the homework

B．simplify what they teach in the classroom

C．reduce homework to develop students' own interests

D．assign more effective homework for students小题3:From the third paragraph, we can infer that homework might ______.

A．leave students lack of job opportunities

B．make students lose the sense of responsibilities

C．weaken students' social adaptation ability

D．cause students to feel lost after graduation小题4:The author insists that homework should be ______.

A．made simpler and easier

B．completely cancelled

C．connected with social activities

D．switched over to subject competitions

可摘局部义齿初戴困难的原因有哪些（）

A.卡环过紧

B.卡环进入倒凹区

C.义齿基托进入倒凹区

D.基牙牙冠过大

E.金属附件进入倒凹区

砂泥岩剖面，综合测井解释在油田勘探阶段的地质任务包括哪些？