影响企业竞争优势的持续时间，主要的是哪3个关键因素？

患者，女，大学生，主诉发热、寒战、头痛，晨起有恶心、呕吐。检查时有颈项强直和背部疼痛症状。腰椎穿刺取三管脑脊液送至实验室，所有三管脑脊液均呈浑浊状，但无血性。

若患者检查结果为：葡萄糖1mmol/L，白细胞900×10⁶/L，见革兰阴性球菌。根据这些实验室检查结果，可初步提示为下列何种疾病（）。

A.病毒性脑膜炎

B.化脓性脑膜炎

C.结核性脑膜炎

D.流行性乙型脑炎

E.新型隐球菌脑膜炎

某烷烃的一氯代物有两种，其中一种的结构简式为：（CH₃）₃CCl，另一种在碱性条件下水解可得A，下面是几种有机物的转化关系：

D遇FeC1₃溶液能发生显色反应，E转化成F只有一种结构，且F能与溴水反应使其褪色．

请回答：

（1）A的结构简式是______．D的结构简式是______．

（2）B→C的化学方程式是______．

（3）写出E→F的化学方程式______．

（4）G是D的一种同分异构体，它能发生催化氧化，写出其催化氧化产物发生银镜反应的化学方程式______．

水垢的主要成分是CaCO₃和MgCO₃。

作业车作业时人员上下作业平台应注意哪些事项？

For the first time, George Bush has acknowledged the existence of secret CIA prisons around the world, where key terrorist suspects—100 in all, officials say—have been interrogated with "an alternative set of procedures". Fourteen of the suspects, including the alleged mastermind of the September 11th attacks, were transferred on Monday to the American naval base at Guantánamo Bay in Cuba, where some will face trial for war crimes before special military commissions.

Many of these men—as Mr. Bush confirmed in a televised speech at the White House on September 6th—are al-Qaeda operatives or Taliban fighters who had sought to withhold information that could "save American lives". "In these cases, it has been necessary to move these individuals to an environment where they can be held secretly (and) questioned by experts," the president said. He declined to say where they had been held or why they had not simply been sent straight to Guantánamo, as some 770 other suspected terrorists have been.

Mr. Bush also refused to reveal what interrogation methods had been used, saying only that, though "tough", they had been "safe and lawful and necessary". Many believe that the main purpose of the CIA’s prisons was to hide from prying eyes the torture and other cruel or degrading treatment used to extract information from prisoners. But Mr. Bush insisted that America did not torture : "It’s against our laws, and it’s against our values. I have not authorised it—and I will not authorise it."

The Pentagon this week issued its long-awaited new Army Field Manual, forbidding all forms of torture and degrading treatment of prisoners by army personnel—though not the CIA. For the first time, it specifically bans forced nakedness, hooding, the use of dogs, sexual humiliation and "waterboarding" (simulated drowning )—all practices that have been used at Guantámamo and Abu Ghraib.

So why did the president decide now to reveal the CIA’s secret programme Partly, he confessed, because of the Supreme Court’s recent ruling that minimum protections under the Geneva Conventions applied to all military prisoners, no matter where they were. This has put American agents at risk of prosecution for war crimes. Mr. Bush has now asked Congress to ban suspected terrorists from suing American personnel in federal courts.

According to the text, the old Army Field Manual lacks（）

A. some forms of degrading treatment of prisoners

B. the trials of time by the CIA

C. torture by army personnel in Abu Ghraib

D. specific ban on "water-boarding"