个人经营贷款信用风险的主要内容为（）。 A.借款人还款能力发生变化 B.保证人还款能

我国历史上第一部由政府编制的成药药典是（）。

语法填空。

     Money really can't buy happiness. According to a new survey, lawyers and __1__ well-paid

white-collar workers are more likely to suffer depression. A national survey of more than 7500

professionals has found that almost one __2__ ten reported moderate (中度) to severe depressive

symptoms. The legal profession had the worst result, _  3__ almost 16 percent reporting symptoms

of clinical depression (临床抑郁症). Next __4__(be) accountants and insurance underwriters,

both on 10 percent. People in IT services, architecture and engineering also had depression rates

above the average.

      The survey __5__ (conduct) by Beyondblue, an organization devoted to fighting depression,

also showed that __6__ under 30 who had the __7__ (high) rates of depression were the most

likely to "self-medicate" with drugs and alcohol. Beyondblue deputy chief executive and _   8__

(psychology), Dr. Nicole Highet, said the survey was first to reveal the extent of the problem. "We

often associate depression with the most socially disadvantaged and people under financial pressure,

__9_ here's a whole different group." Dr. Highet said, She said while it was difficult to know exactly

__10_ made some groups more prone to depression, it was likely to be driven by work pressures.

单纯二尖瓣狭窄患者可有（）

A.左房扩大，右房缩小

B.右房扩大，左房缩小

C.右室缩小，左房扩大

D.左室缩小或正常，左房扩大

E.左房扩大，左室扩大

财务授权由理（董）事长代表理（董）事会授予（）。

A、主任

B、副主任

C、财务总监

D、分支机构负责人

智利硝石矿层中含有碘酸钠，可用亚硫酸氢钠与其反应来制备单质碘。

(1)试配平该反应的化学方程式，并用短线标出电子转移方向及总数。

(2) 

(2)已知含氧酸盐的氧化作用随溶液酸性的加强而增强，在制备实验时，定时取样，并用酸化的氯化钡来检测SO生成的量，发现开始阶段反应速率呈递增的趋势，试简述这一变化趋势发生的原因：                                     。