干制海参最适合清水煮焖或甲醛火碱水溶液浸泡涨发加工。( )

下列药物中，能燥湿止带的是

A．防风

B．白芷

C．羌活

D．苍耳子

E．藁本

把220V的正弦交流电压加在440Ω的电阻上，该电阻上（　　）

A．电压的有效值为220V，电流的有效值为0.5A

B．电压的最大值为220V，电流的有效值为0.5A

C．电压的有效值为220V，电流的最大值为0．SA

D．电压的最大值为220V，电流的最大值为0.5A

湿地与森林、海洋被称为全球三大生态系统，其在防洪、抗旱、调节气候、控制污染等方面具有其他生态系统所不可替代的功能和效益，被誉为“地球之肾”。据此回答6～8题。

小题1:下列地理事物中都属于湿地的是    (    )

①纳木错湖   ②滩涂   ③黄河    ④渤海     ⑤水稻田 

A．①②③④

B．②③④⑤

C．①③④⑤

D．①②③⑤小题2:我国政府下令停止开垦三江平原上的沼泽地，主要原因是    (   )

A．三江平原的土壤十分贫瘠

B．开发的成本太高

C．粮食过剩，价格下降

D．为了保护、改善生态环境小题3:长江中下游湿地破坏严重，主要是因为该地区    (    )

A．用水增多，地表水减少

B．河湖淤废

C．城市化建设和围湖造田占用大量湿地

D．大片湿地改建为鱼糖

The average age for women to marry is between 18 and 25.25 tend to (1) when somewhat older. A church wedding often (2) the legal civil ceremony, and a large reception, which often involves (3) music and dancing, is held in the evening. Wedding traditions include (4) money on the bride’s dress to represent future prosperity, the groom (5) the bride at her home, and the couple pulling on opposite (6) of a loaf of bread—whoever gets the largest piece will be (7) boss of the family. Honeymoons are a new tradition.
The principle (8) mutual support is valued in the Bulgarian family. The elderly are (9) cared for by their adult children. Unmarried adults live with their (10) and many newly married couples live with one set of parents (11) they are able to get housing of their own. Most families (12) urban areas live in apartments, which are in short
supply, while (13) in rural areas usually have their own houses. Many village houses (14) owned by families who live in urban areas, who use them_ (15) summer and weekend retreats, or for retired parents.
Most families in (16) areas do not have more than two children, while families in (17) areas tend to be larger. Grandparents play an important role in (18) care, particularly in urban areas, where most women work outside the (19) . Men of the younger generation have begun to help with household (20) , once considered only women’s responsibility.

监控装置备用速度传感器工作电源15V短路，会导致什么现象？