向pH=0的A溶液中加入几滴酚酞试液后振荡,溶液呈______色.要使上述混合溶 发布时间:2017-06-25 00:35 │ 来源:www.tikuol.com 题型:填空题 问题: 向pH=0的A溶液中加入几滴酚酞试液后振荡,溶液呈______ 色.要使上述混合溶液颜色发生改变.可向其中加入______ 溶液,用A溶液判断铝和铜金属活动性顺序的操作方法是______.
题型:填空题 设有如下三个命题:甲:相交直线l、m都在平面α内,并且都不在平面β内;乙:直线l、m中至少有一条与平面β相交;丙:平面α与平面β相交.当甲成立时( )A.乙是丙的充分而不必要条件B.乙是丙的必要而不充分条件C.乙是丙的充分且必要条件D.乙既不是丙的充分条件又不是丙的必要条件 查看答案
题型:填空题 完形填空。 Bringing a giraffe into the world is a tall order.A baby giraffe falls 10 feet from its mother's womb (子宫) and usually lands on its 1_.Within seconds it rolls over and tucks(缩拢) its legsunder its body.Gary Richmond describes how a newborn giraffe learns it first 2 in his book, A View from the Zoo. The mother giraffe 3 her head long enough to take a quick look.Then she _4 herself directly over her calf.She waits for about a minute, and then she does the most 5 thing.She swings her long leg outward and kicks her baby. If the baby giraffe doesn't 6 , the violent process is repeated over and over again.The _7 to rise is very important.As the baby calf grows 8 , the mother kicks it again to stimulate(激励) its efforts.Finally, the calf stands for the first time on its 9 legs. Then mother giraffe does the most remarkable thing.She kicks it off its feet again. 10 ? She wants it to remember how it got up.In the wild, baby giraffes must be able to get up as 11 as possible to stay with the herd(鹿群), where there is 12 .Wild animals and hunting dogs all 13 young giraffes, and calves would be punished if the mother didn't 14 her calf to be watchful and get up quickly. Irving Stone 15 this.He spent a lifetime studying 16 , writing novelized biographies of such men as Michelangelo, Vincent van Gogh, and Charles Darwin. Stone was once asked if he had found a 17 that runs through the lives of all these exceptional people.He said, "They are 18 over the head, knocked down, and for years they still get 19 .But every time they are knocked down, they stand up.You cannot 20 these people.And at the end of their lives they've accomplished some modest part of what they set out to do.( )1.A.back ( )2.A.look ( )3.A.raises ( )4.A.throws ( )5.A.difficult( )6.A.get up ( )7.A.demand ( )8.A.excited ( )9.A.strong ( )10.A.Why ( )11.A.slowly ( )12.A.danger ( )13.A.hate ( )14.A.teach ( )15.A.accepted( )16.A.kindness( )17.A.history ( )18.A.injured ( )19.A.nowhere ( )20.A.change B.side B.move B.lowers B.finds B.greedy B.work on B.struggle B.worried B.dusty B.When B.quickly B.love B.punish B.urge B.remembered B.greatness B.record B.beaten B.anywhere B.support C.front C.lesson C.pulls C.points C.unreasonableC.lie down C.request C.surprised C.weak C.Where C.carefully C.silence C.enjoy C.remind C.declared C.nature C.thread C.killedC.everywhereC.blame D.head D.class D.draws D.positions D.uncreative D.come up D.failure D.tired D.short D.Which D.frequently D.safety D.watch D.allow D.understood. D.expectation D.means D.hurt. D.somewhere D.destroy 查看答案
题型:填空题 王女士于2007年10月20日与某保险公司订立了一份人寿保险合同,当天缴清全部保险费,但保险公司因故未能及时签发保险单。此后不久,王女士不幸因车祸身亡。本案人寿保险合同依我国《保险法》,将产生何种法律效果?()A.因保险人未签发保险单而效力待定B.因保险人未签发保险单而解除C.因保险人未签发保险单而可撤销D.不因保险人未签发保险单而归于无效 查看答案