石油钻井专用管材摆放在专用支架上，高度不超过（）层，各层边缘用绳系牢或专用装臵设施固

Today I’d like to talk about how to become a (1) . Usually you have to start at the beginning. That is, you have to begin (2) of some sort on a local newspaper, a (3) , maybe on a small magazine -- work (4) . Now there aren’t that many organizations which have large numbers of foreign correspondents so you also have to (5) with that aim (6) . Another way of doing it is to work abroad, and work as (7) . That’s somebody who sells stories, and gets paid (8) , to newspapers and magazines and so on. And hoping to (9) that way, and eventually to be offered a (10) .
I don’t really know (11) are needed, but obviously a degree in modern languages or (12) would be very useful. But, a degree in itself probably wouldn’t (13) . It wouldn’t be enough to get you job. It wouldn’t (14) to make an editor decide to (15) . So it’s difficult to define the (16) . You’re going to need (17) and the ability to assimilate information (18) and then produce stories which (19) of the newspaper or radio or television station you (20) .

福厦高速铁路正式通车后，将使厦门至福州的时间缩短为1.5小时，能很好地满足旅客对安全、舒适、便捷的要求，方便人民群众出行。下列说法正确的是

A．火车和汽车是互补商品，可以相互补充

B．火车票的价格会下跌，铁路行业盈利上升

C．形成火车运营垄断，不利于汽车运营行业的发展

D．促使汽车运营行业改善经营管理，提高竞争力

食管癌的放射治疗，下列哪种情况属于禁忌证（）。

A.食管扩张、潴留

B.压迫气管使之管腔狭窄>50%

C.食管壁有深溃疡

D.已植入记忆合金支架

E.合并不稳定性心绞痛

以下关于删除数据库的叙述中，______是正确的。

A．删除数据库文件前必须先关闭数据库

B．删除数据库文件前必须先删除表文件

C．删除数据库文件前必须先将表文件移出

D．只能使用命令法删除数据库文件

油管输送式射孔深度计算中，调整距=（）。