莽草酸是一种合成治疗禽流感药物达菲的原料,鞣酸存在于苹果、生石榴等植物中.下列关

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问题:

莽草酸是一种合成治疗禽流感药物达菲的原料,鞣酸存在于苹果、生石榴等植物中.下列关于这两种有机化合物的说法正确的是

A.两种酸都能与溴水反应

B.两种酸遇三氯化铁溶液都显色

C.鞣酸分子与莽草酸分子相比多了两个碳碳双键

D.等物质的量的两种酸与足量碳酸钠反应消耗碳酸钠的量相同

考点:结构简式结构式
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下列关于社会保险费用缴纳的说法正确的是:()

A.用人单位应当自劳动合同生效之日起30日内为其职工向社会保险经办机构申请办理社会保险登记

B.社会保险自愿参加

C.用人单位应当自行申报、按时足额缴纳社会保险费,如因单位效益大幅下降等经相关机构批准可以缓缴

D.无雇工的个体工商户可以直接向社会保险费征收机构缴纳社会保险费

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Because he wrote his name so that it could be read easily, John Hancock has a place in the dictionary.

John Hancock was a wealthy man who helped the patriots in the American Revolution. He was president of the Continental Congress. He was also governor of Massachusetts and one of the first men of sign the Declaration of Independence. Yet he is remembered best for his large signature.

The story is told that when Hancock sat down to sign the Declaration of Independence, he said that he would write his signature large enough for John Bull to read without his glasses. Hancock’s signature on the Declaration is four the three-quarter inches long—an inch longer than his usual signature.

Today John Hancock can be used to mean any person’s signature.

1. The passage is mainly about______________.

A. the American Revolution

B. John Hancock’s handwriting

C. how an American expression began

D. signing the Declaration of Independence

2. Hancock is remembered best because he________.

A. was governor of Massachusetts

B. helped the patriots in the Revolution

C. signed his name in large letters

D. was president of the Continental Congress

3. According to the dictionary, a John Hancock is a________.

A. governor                          B. man who sign petitions

C. strong patriot                     D. person’s signature

题型:选择题

肺心病慢性呼吸衰竭患者,血气分析结果:pH7.188,PaCO75mmHg,PaO50mmHg,27.6mmol/L,BE-5mmol/L,其酸碱失衡类型是()

A.代谢性酸中毒

B.呼吸性酸中毒

C.呼吸性酸中毒合并代谢性酸中毒

D.代谢性碱中毒

E.呼吸性酸中毒合并代谢性碱中毒

题型:选择题

低温保冷工程多用()材料,此类材料具有表观密度小、导热系数低等特点。

A.有机绝热

B.纤维状

C.无机绝热

D.耐高温

题型:选择题

按过滤机理,可将过滤分为()过滤和()过滤。前者滤渣堆积在过滤介质表面,后者过滤作用发生在()的全部空隙体内。所以()过滤比()过滤能滤出更多的杂质。

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