从正三角形、正四边形、正五边形、正六边形、正八边形、正十边形、正十二边形中任选一

鞍区麻醉

佝偻病活动期临床表现主要是（）

A.生长中的骨骼改变、肌肉松弛和神经兴奋性改变

B.神经症状、骨骼改变

C.易激惹、烦躁、多汗、枕部秃发

D.颅骨软化、鸡胸、X型腿

E.骨缝、前囟、后囟闭合及出牙延迟

在进行酸碱中和反应的实验时，向烧杯中的氢氧化钠溶液滴加稀盐酸一会儿后，发现忘记了滴加指示剂，因而无法确定盐酸与氢氧化钠是否恰好完全反应．为了证明这两种物质是否恰好完全反应，从烧杯中取了少量反应后的溶液于一支试管中，并向试管中滴加几滴无色酚酞试液，振荡，观察到酚酞试液不变色．于是得出“两种物质已恰好完全中和”的结论．

（1）你认为此结论是否正确？        ，理由是                                      ；

（2）写出该中和反应的化学方程式                          ；

（3）请你另设计一个实验，探究上述烧杯中的溶液是否恰好完全中和，填写下表：

（4）写出（3）中可能发生反应的化学方程式                             

接户线固定端采用绑扎固定时，其绑扎长度应符合，导线截面70～120mm2，绑扎长度（）mm。

A、≥120

B、≥200

C、≥150

D、≥180

When Liam McGee departed as president of Bank of America in August, his explanation was surprisingly straight up. Rather than cloaking his exit in the usual vague excuses, he came right out and said he was leaving “to pursue my goal of running a company.” Broadcasting his ambition was “very much my decision,” McGee says. Within two weeks, he was talking for the first time with the board of Hartford Financial Services Group, which named him CEO and chairman on September 29.
McGee says leaving without a position lined up gave him time to reflect on what kind of company he wanted to run. It also sent a clear message to the outside world about his aspirations. And McGee isn’t alone. In recent weeks the No.2 executives at Avon and American Express quit with the explanation that they were looking for a CEO post. As boards scrutinize succession plans in response to shareholder pressure, executives who don’t get the nod also may wish to move on. A turbulent business environment also has senior managers cautious of letting vague pronouncements cloud their reputations.
As the first signs of recovery begin to take hold, deputy chiefs may be more willing to make the jump without a net. In the third quarter, CEO turnover was down 23% from a year ago as nervous boards stuck with the leaders they had, according to Liberum Research. As the economy picks up, opportunities will abound for aspiring leaders.
The decision to quit a senior position to look for a better one is unconventional. For years executives and headhunters have adhered to the rule that the most attractive CEO candidates are the ones who must be poached. Says Korn/Ferry senior partner Dennis Carey:” I can’t think of a single search I’ve done where a board has not instructed me to look at sitting CEOs first.”
Those who jumped without a job haven’t always landed in top positions quickly. Ellen Marram quit as chief of Tropicana a decade age, saying she wanted to be a CEO. It was a year before she became head of a tiny Internet-based commodities exchange. Robert Willumstad left Citigroup in 2005 with ambitions to be a CEO. He finally took that post at a major financial institution three years later.
Many recruiters say the old disgrace is fading for top performers. The financial crisis has made it more acceptable to be between jobs or to leave a bad one. “The traditional rule was it’s safer to stay where you are, but that’s been fundamentally inverted,” says one headhunter. “The people who’ve been hurt the worst are those who’ve stayed too long.”

The word “poached” (Line 3, Paragraph 4) most probably means

A．approved of.
B．attended to.
C．hunted for.
D．guarded against.