【简答题】在改写后的句子中填入所缺单词,使其与原句意思相符: 1. The boy is five years old. He couldn't find his way in the park yesterday. The _______ boy _______ _______ _______ in the park yesterday. 2. How often does Jim get a lette...
【简答题】How often is a fire drill required to be carried out on cargo ships?
【简答题】How often is a fire drill required to be held in a passenger ship?
【简答题】阅读理解(这一部分共五篇短文, A 至 D 篇短文后有五个小题,E 篇后有六个小题, 每小题 2 分, 共 52 分) (A) 请阅读下面的海报,从每小题所给的A,B,C 三个选下中选出一个最佳选项,并在答题卡上将该选项涂黑。 House fires often happened. So it appears necessary to learn something useful to prote...
【单选题】生产观念、产品观念、推销观念本质都是以公司()为中心、以公司()为导向的市场营销的观念。
【判断题】tension wheel张紧轮的翻译是否正确?
【单选题】一个微型吸尘器的直流电动机的额定电压为 U ,额定电流为 I ,线圈电阻为 R ,将它接在电动势为 E 、内阻为 r 的直流电源的两极间,电动机恰好能正常工作,则 ( ) 。
【判断题】自动空调控制系统包括传感器、执行器、ECU
【单选题】一般来说,用电器的工作电压并不等于额定电压,家庭里通常不备电压表,但借助电能表可以测出用电器的实际工作电压,现在电路中只接入一个电热水虚的名牌,如图(a)所示,测得图(b)所示的电能表的转盘转过125转的时间为121s,根据所给信息可知( )
C.
电热水壶在121秒内实际消耗电功为1.5×10的5次方焦