如何把3V電源昇高到1萬V

l was so_____in my book that l didn't hear the doorbell ring.A.concentrated B.absorbed C.l was so_____in my book that l didn't hear the doorbell ring.A.concentrated B.absorbed C.engaged D.occupied I can't find my key.Maybe it is ___ (miss) unless 与if not帮我分析一下例句：I'll be surprised if he doesn't have an accident.（这句可以用unless来换么?为什么）I'll be back tomorrow unless there's a plane strike.(为句可以用if not来换么?为什么）unless=if not, unless与if…not表示否定条件时有何区别? 陋室铭 能体现怡然自得 恬淡闲适句子 市民通过人大代表反映问题是在行使自己那项政治权 not if与unless 区别 怎样履行自己的体育权利与义务 玄奘 鉴真 郑和的对外交往有什么不同 权利与义务的关系是怎样的?未成年在进行自我保护的时候,怎样正确行使权利? Here is my ticket.这是这句话的正常语序.却用了倒装 Here is my ticket. 都这么这个倒装在什么时候用啊在什么情况要下使用倒装句式? 请问一个问题哈!My ticket is here 和Here is my ticket 哪个对呢! Here my ticker is.Here my ticker is 和Here is my ticker .不是一样的吗？那么 Here it comes 和 Here comes it 可以这样吗？ Here is my ticket.请问这句是"我的车票给你"?还是"这是我的票"?还是"我的票在这"? Here is my ticket这句话主语是啥啊 有系动词吗 My ticket is here是不是和上面那句话一个意思啊 （-2）2008次方+（-2）2009次方等于什么要的数 哈哈,如果我把它用作标题的话有错吗? 此致敬礼中的此指什么? 一道数学乘方规律题2∧1-1=1,2∧2-1=3,2∧3-1=7,2∧4-1=15,2∧5-1=31,.帮算算2∧2007-1的个位数字是多少. “此致敬礼”是何意? 此致敬礼格式所代表的含义是什么?主要问这种格式的含义,比如为什么顶格写 if not 和unless的区别(初3上英语）用法上区别2.though laws（法律）heve been ___to control the population growth,in some place____is done to carry out the law.第一个空的选项：A pass B passed C broken D thought第2个；A many B Is she Nancy?答语可以是No,she's not.吗? 我们老师就是这样教的,我觉得不对Is she Nancy?答语可以是No,she's not.吗?我们老师就是这样教的,我觉得不对,因为我学这么长时间英语没有听说过可以这样答! 谈谈“汝果欲学诗,功夫在诗外”这句诗对你今后的习作有什么启发?1.谈谈“汝果欲学诗,功夫在诗外”这句诗对你今后的习作有什么启发?2.轻叩诗歌的大门,徜徉在诗歌的百花园中,我们的生活 汝果欲学诗,功夫在诗外 这句诗对你今后的习作有什么启发? 汝果欲学诗,功夫在诗外的意思 “汝果欲学诗,功夫在诗外”具体什么意思?具体的. The reason---she gives for not coming to the party is that her mothor won’t let herA what b when c as d which The reason________ she gives for not coming to the party is that her mother won’t lether.A.what B.why C.as D.which the reason ——she gives for not coming to the party is that her mother will not let her comea.what b.why c.as d.不填 【英语语法】Unless 和 If not 能互换吗? The reason()her not coming was that she missed the bus.A of B at C for D why