履约保证金额的大小取决于（），但必须保证承包人违约时，发包人不受损失。A．招标项目的

硒化卡拉胶是由（）与卡拉胶反应制得。

A、亚硒酸钙

B、亚硒酸钾

C、亚硒酸铁

D、亚硒酸钠

下列说法中，正确的是

A．ΔH＞0 kJ/mol表示放热反应，ΔH＜0 kJ/mol表示吸热反应

B．1 mol H₂SO₄与1 mol Ba(OH)₂反应生成BaSO₄沉淀时放出的热叫中和热

C．1 mol H₂与0.5 mol O₂反应放出的热就是H₂的燃烧热

D．热化学方程式中的化学计量数表示物质的量，所以可以是分数

与项目管理相比，大型及复杂项目管理是对大项目的 (68) 管理，以达到大项目的战略目标和效益。

A．松耦合、粗粒度

B．紧耦合、细粒度

C．分布式灵活

D．集中式协同

王女士，28岁，未婚，有性生活史，孕1产0，2年前有人工流产史，此次以“停经56天，少量 * * 出血伴下腹痛2天”入院，入院时HCG值为1014.6KU/L，B超显示子宫旁有一低回声区，入院后给予MTX50mg肌注。
根据以上资料，请写出：
(1)病人可能的医疗诊断。
(2)HCG和MTX的中文名称。
(3)病人住院期间保守治疗的护理。

Passage Three

No woman can be too rich or too thin. This saying often attributed to the late Duchess(公爵夫人) of Windsor embodies much of the odd spirit of our times. Being thin is deemed as such a virtue.

The problem with such a view is that some people actually attempt to live by it. I myself have fantasies of slipping into narrow designer clothes. Consequently, I have been on a diet for the better—or worse—part of my life. Being rich wouldn’t be bad either, but that won’t happen unless an unknown relative dies suddenly in some distant land, leaving me millions of dollars.

Where did we go off the track When did eating butter become a sin, and a little bit of extra flesh unappealing, if not repellent All religions have certain days when people refrain from eating, and excessive eating is one of Christianity’s seven deadly sins. However until quite recently, most people had a problem getting enough to eat. In some religious groups, wealth was a symbol of probable salvation and high morals, and fatness a sign of wealth and well-being.

Today the opposite is true. We have shifted to thinness as our new mark of virtue. The result is that being fat—or even only somewhat overweight—is bad because it implies a lack of moral strength.

Our obsession with thinness is also fueled by health concerns. It is true that in this country we have more overweight people than ever before, and that, in many cases, being over weight correlates with an increased risk of heart and blood vessel disease. These diseases, however, may have as much to do with our way of life and our high-fat diets as with excess weight. And the associated risk of cancer in the digestive system may be more of a dietary problem--too much fat and a lack of fiber—than a weight problem.

The real concern, then, is not that we weigh too much, but that we neither exercise enough nor eat well. Exercise is necessary for p bones and both heart and lung health. A balanced diet without a lot of fat can also help the body avoid many diseases. We should surely stop paying so much attention to weight. Simply being thin is not enough. It is actually hazardous if those who get (or already are) thin think they are automatically healthy and thus free from paying attention to their overall lifestyle. Thinness can be pure vainglory.

The author criticizes women’s obsession with thinness（）．

A．from an economic and educational perspective

B．from sociological and medical points of view

C．from a historical and religious standpoint

D．in the light of moral principles