如图所示，矩形线圈有N匝，长为a，宽为b，每匝线圈电阻为R，从磁感应强度为B的匀

Smoking is a very bad habit. First of all, Cigarettes are expensive. Smokers have to   小题1:   a lot of money buying them. That is a   小题2:  (浪费) of money. Smoking is bad for smokers’ h 小题3: . It may be responsible for many d  小题4:  . Even worse, it is harmful to people 小题5:   them. It is said that smoking is one of the ways to   (引起) cancer. Second, there can be fires  小题6:   can result in a great loss of life and property because of a smoker’s (粗心). 小题7:   , we are teenagers and have no income. We have no right to do that. It will be even worse if we f 小题8: into bad habits.

会计档案的保管期限，从会计年度终了的最后一天算起

许多甲虫和蝶蛾类幼虫是虹吸式口器，能把植物咬成对缺刻、穿孔或咬断吃光。

办理二手房按揭贷款业务，关于客户购买抵押财产保险说法正确的是（）。

A.必须购买抵押财产保险

B.不需购买抵押财产保险

C.根据借款人经济条件决定是否购买保险

D.根据当地实际情况以及借款人所购房产的状况，决定是否购买保险

计量器具必须经省公司计量检定中心（）后，方可使用，量油尺和温度计要达到（）。