两个运输队，第一队有320人，第二队有280人，现因任务变动，要求第二队的人数是第一

男，30岁，近3日呃逆时作，脘腹满闷，口臭烦渴，便秘尿赤，苔黄腻，脉数。本病例辨证为（）

A.肝郁化火

B.肝胆湿热

C.胃火上逆

D.肝气郁结

E.以上都不是

在x轴的原点O和轴上的P点，分别固定同种电荷和，已知，OP距离为2L，则场强为零的坐标x区间为[ ]

A．x＞0　　　　

B．0＜x＜L　　

C．L＜x＜2L

D．x＞2L 

经过漫长的岁月，人类由弱变强经过了哪几个关键阶段（　　）

①直立行走，解放前肢     ②使用工具

③制造简单工具           ④大脑发达，产生语言．

A．①②③④

B．②③①④

C．①③②④

D．①②④③

If soldiering was for the money, the Special Air Service (SAS) and the Special Boat Service (SBS) would have disintegrated in recent years. Such has been the explosion in private military companies (PMCs) that they employ an estimated 30 000 in Iraq alone -- and no government can match their fat salaries. A young SAS trooper earns about￡ 2,000($3 500) a month; on the "circuit", as soldiers call the private world, he could get ￡15 000. Why would he not

For reasons both warm-hearted and cool-headed. First, for love of regiment and comrades, bonds that tend to be tightest in the most select units. Second, for the operational support, notably field medicine, and the security, including life assurance and pension, that come with the queen’s paltry shilling.

Although there has been no haemorrhaging of special force (SF) fighters to the private sector, there has been enough of a trickle to cause official unease. A memo recently circulated in the Ministry of Defence detailed the loss of 24 SF senior non-commissioned officers to private companies in the past year. All had completed 22 years of service, and so were eligible for a full pension, and near the end of their careers. Yet there is now a shortage of hard-bitten veterans to fill training and other jobs earmarked for them, under a system for retaining them known as "continuance."

America has responded to the problem by throwing cash at it, offering incentives of up to $150 000 to sign new contracts. The Ministry of Defence has found a cheaper ploy. It has spread the story of two British PMC employees, recently killed in Iraq, whose bodies were left rotting in the sun

In the last paragraph of the text, the author has （）

A. comment on a tip

B. anticipate a result

C. made a contrast

D. depict a sample

如何调整静噪电位器？静噪过深过浅对通话有什么影响？