肾上腺素的适应证是 A．上消化道出血 B．各种休克 C．急性肾功能不全 D．心跳骤停

38岁初孕妇，妊35周，头先露，因1周来下肢水肿，两天来头晕头痛、视物不清，检查BP160／l10mmHg，尿蛋白（++）而住院，未孕前有过血压140/90mmHg。

该孕妇应给予下列哪项处理（）

A.立即剖宫产终止妊娠

B.积极治疗24～48小时后行剖宫产

C.积极治疗24小时后行引产

D.积极治疗至36周后引产

E.若无胎儿窘迫可继续妊娠

矿井下常用的透风设施有（）、（）、（）、（）等四种。

All living cells on earth require moisture for their metabolism. Cereal grains when brought in from the field, although they may appear to be dry, may contain 20 per cent of moisture or more. If they are stored in a bin thus, there is sufficient moisture in them to support several varieties of insects. These insects will, therefore, live and breed and, as they grow and eat the grain, it provides them with biological energy for their life processes. This energy will, just as in man, become manifest as heat. Since the bulk of the grain acts as an insulator, the temperature surrounding the colony of insects will rise so that, not only is part of the grain spoiled by the direct attack of the insects but more may be damaged by the heat. Sometimes, the temperature may even rise to the point where the stored grain catches fire. For safe storage, grain must be dried until its moisture content is 13 per cent or less.

Traditional arts of food preservation took advantage of this principle in a number of ways. The plant seeds, wheat, rye, rice, barley millet, maize, are themselves structures evolved by nature to provide stored food. The starch of their endosperm is used for the nourishment of the embryo during the time it over-winters (if it is a plant of the Temperate Zone) and until its new leaves have grown and their chlorophyll can trap energy from the sunlight to nourish the new-grown plant. The separation by threshing and winnowing is, therefore, to some degree part of a technique of food preservation.

The direct drying of other foods has also been used. Fish has been dried in many parts of the world besides Africa. Slices of dried meat are prepared by numerous races. Biltong, a form of dried meat, was a customary food for travelers. The drying of meat or fish, either in the sun or over a fire, quite apart from the degree to which it exposes the food to infection by bacteria and infestation by insects, tends also to harm its quality. Proteins are complex molecular structures which are readily disrupted. This is the reason why dried meat becomes tough and can, with some scientific justification, by likened to leather.

The technical process of drying foods indirectly by pickling them in the p salt solutions commonly called "brine" does less harm to the protein than straightforward drying, particularly if this is carried out at high temperatures. It is for this reason that many of the typical drying processes are not taken to completion. That is to say, the outer parts may be dried leaving a moist inner section. Under these circumstances, preservation is only partial. The dried food keeps longer than it would have undried but it cannot be kept indefinitely. For this reason, traditional processes are to be found in many parts of the world in which a combination of partial drying and pickling in brine is used. Quite often the drying involves exposure to smoke. Foods treated in this way are, besides fish of various sorts, bacon, hams and numerous types of sausages.

In speaking of the traditional methods of food preservation, the writer（）

A．expresses doubts about direct smoking

B．describes salting and pickling as ineffective

C．condemns direct drying

D．mentions threshing and winnowing

配制硝酸钾溶液时得到下表数据，根据表中数据分析，不正确的是（　　）

A．28℃时10克水中最多能溶解硝酸钾4克

B．60℃时等质量水中能溶解的硝酸钾比28℃时多

C．①②所得溶液溶质的质量分数相等

D．③所得溶液一定是硝酸钾的饱和溶液

下列各项不属于商品证券的是( )。

A．提货单
B．运货单
C．商业本票
D．仓库栈单