土壤中某些真菌和高等植物根系形成共生体，称为______。

第30届奥运会于英国伦敦夏令时（比标准时间快一小时）2012年7月27日20：12开幕，图是开幕当日四个城市的昼夜长短分布示意图，图中阴影部分表示黑夜，读图完成题。

小题1:甲、乙、丙、丁四地，从南向北排列正确的是

A．甲乙丙丁

B．丙丁乙甲

C．乙甲丁丙

D．甲乙丁丙小题2:当伦敦夏令时（比标准时间快一小时）7月27日20：12开幕时，对应的北京时间为

A．7月27日3:12

B．7月28日3:12

C．7月28日4:12

D．7月27日4:12

消化性溃疡的主要症状为（）

A.厌食、消瘦

B.恶心、呕吐

C.嗳气、反酸

D.上腹疼痛

E.呕血、黑便

Cameron thought of himself as merely organized. He certainly did not consider that he took great pains over anything, he did just enough to get it right. Exactly right, of course, for as he was fond of telling his staff, "if it's not exactly right, it's wrong". Occasionally a worker might be sad on hearing these words, because it meant another hour or so of going over the same bit of work, correcting the mistakes which Cameron had patiently pointed out. And doing the corrections exactly right of course.

Strangely enough, his department had the reputation for performing the highest quality work in the company, and it was seen, and not only by those who worked in the department, as a sort of elite (出类拔萃) unit. Those programmes that had to work first time, straight out of the box, Cameron's men got those. "It's mission (任务) critical—give it to Cameron" was almost a catch-phrase with his team.

It helped that Cameron was not merely particular about things. He wanted things done just so, not because of a personal taste, but because he had discovered through patient experimentation that this was the best way for it to be done.

In Cameron's dictionary, "Take as long as you want" meant that you could work on your task not just in office hours, but that evening, and late into the early hours of the following morning if you so desired. But the project had to be in by its completion date, and yes, done exactly right. Or you did it again.

But he would always be regarded, and not least by himself, as someone who had failed to meet requirements, one of those who just couldn't cut it. You had to face it, if you were not working for Cameron, you were second best. So when word got out that Cameron had messed up, big time, the news was greeted with a mixture of sympathy, and entire relief that this perfection too was human.

小题1:Cameron was a___________.

A．software programmer

B．a chief scientist

C．quality controller

D．head of department小题2:"Mission-critical" work was given to Cameron because___________.

A．Cameron's work was error-free

B．Cameron was critical

C．he didn't mind working late

D．he had a good team小题3:Working for Cameron, people felt that___________.

A．they were part of an elite

B．their mission was critical

C．Cameron was very particular about things

D．Cameron was patient and responsible小题4:According to the underlined part in Paragraph 5, what is meant by someone “who couldn't cut it” ?

A．He didn’t cut corners.

B．He wasn't good enough.

C．He had the wrong measurements.

D．He was a perfection.小题5:What can we learn about Cameron?

A．He never got things wrong.

B．He didn’t allow for any mistake.

C．He encouraged work to be done in office hours.

D．He was often misunderstood.小题6:The attitude of the author towards Cameron is that of being___________.

A．positive

B．sympathetic

C．non-subjective

D．optimistic

在国际贸易中，运输标志的式样和文字一般由( )。

A．买方提供

B．卖方提供　

C．运输部门设计并刷制　

D．生产经营单位设计并刷制

如何维护学生的合法权益？