题目

图所示的是恒温箱的简易电路图．其工作原理是，接通工作电路后，电热丝加热，箱内温度升高，当箱内温度达到温度计金属丝A所指的温度时，控制电路接通，电磁铁有磁性，衔铁被吸下，工作电路        ，电热丝停止加热．当箱内温度低于金属丝A所指的温度时，控制电路断开，衔铁被                           ，工作电路再次工作，电热丝加热，从而保持恒温箱内温度恒定． 完形填空 　　Do you have the ability to live cheaply? Now here’s a true story of an American girl, Sarah．After Sarah left university, 　　1　　 began to live in New York City on her own．She 　　2　　 a job in a publishing house, but the salary was less than ＄30，000 a year．Her parents thought her life would be hard, but Sarah could live on her 　　3　　 and still saved ＄5, 000 in a year．How was that 　　4　　 in one of the most expensive cities in the world? 　　Cheap living always starts with keeping the big cost small．For most people, that means housing．So Sarah chose to 　　5　　 a flat with three other friends．Her next biggest cost was 　　6　　．When she ate out, she went to cheap restaurants．　　7　　 she bought a ＄9.99 whole chicken at a local restaurant．She then 　　8　　 the chicken bones(骨头)home and made soup out of them．Nowadays young people often 　　9　　 a lot of money on entertainment(娱乐)．But Sarah said, “I enjoy walking 　　10　　 in New York City．I love going to museums and parks．” Did Sarah feel poor by cheap living? Not really．She 　　11　　 managed to take two trips, one to the Netherlands, the other to Portland． 　　“Don’t think of saving money as something 　　12　　．It’s a kind of game,” said Sarah． (1) [　　] A． he B． she C． we D． they (2) [　　] A． found B． tried C． asked for D． looked for (3) [　　] A． salary B． time C． dream D． idea (4) [　　] A． difficult B． possible C． useful D． different (5) [　　] A． buy B． sell C． stay D． share (6) [　　] A． food B． rest C． studying D． playing (7) [　　] A． Soon B． Finally C． Once D． Again (8) [　　] A． prepared B． took C． caught D． picked (9) [　　] A． pay B． lend C． spend D． save (10) [　　] A． along B． up C． down D． around (11) [　　] A． even B． seldom C． always D． never (12) [　　] A． hard B． interesting C． nice D． great