- 条件充分性判断已知abc≠0,则() (1) (2)
- A 、条件(1)充分,但条件(2)不充分
- B 、条件(2)充分,但条件(1)不充分
- C 、条件(1)和(2)单独都不充分,但条件(1)和条件(2)联合起来充分
- D 、条件(1)充分,条件(2)也充分
- E 、条件(1)和(2)单独都不充分,条件(1)和条件(2)联合起来也不充分
扫码下载亿题库
精准题库快速提分
参考答案
【正确答案:C】
条件(1)和条件(2)单独都不是充分的,
联合条件(1)和条件(2),
因此,
您可能感兴趣的试题
- 1 【条件充分性判断】 如图,在三角形ABC中,已知EF//BC,则三角形AEF的面积等于梯形EBCF的面积。() (1)AG|=2|GD| (2)|BC|=EF|
- A 、条件(1)充分,但条件(2)不充分
- B 、条件(2)充分,但条件(1)不充分
- C 、条件(1)和(2)单独都不充分,但条件(1)和条件(2)联合起来充分
- D 、条件(1)充分,条件(2)也充分
- E 、条件(1)和(2)单独都不充分,条件(1)和条件(2)联合起来也不充分
- 2 【条件充分性判断】 已知三角形ABC的三条边长分别为a,b,c。则三角形ABC是等腰直角三角形。() (1) (2)
- A 、条件(1)充分,但条件(2)不充分
- B 、条件(2)充分,但条件(1)不充分
- C 、条件(1)和(2)单独都不充分,但条件(1)和条件(2)联合起来充分
- D 、条件(1)充分,条件(2)也充分
- E 、条件(1)和条件(2)单独都不充分,条件(1)和(2)联合起来也不充分
- 3 【问题求解】如图,△ABC是直角三角形,为正方形,已知a,b,c分别是的边长,则()。
- A 、a=b+c
- B 、
- C 、
- D 、
- E 、
- 4 【条件充分性判断】 如图,在三角形ABC中,已知EF∥BC,则三角形AEF一的面积等于梯形EBCF的面积。() (1)|AG|=2|GD| (2)
- A 、条件(1)充分,但条件(2)不充分
- B 、条件(2)充分,但条件(1)不充分
- C 、条件(1)和(2)单独都不充分,但条件(1)和条件(2)联合起来充分
- D 、条件(1)充分,条件(2)也充分
- E 、条件(1)和(2)单独都不充分,条件(1)和条件(2)联合起来也不充分
- 5 【条件充分性判断】已知三角形ABC的三条边长分别为a,b,c,则三角形ABC是等腰直角三角形。() (1) (2)
- A 、条件(1)充分,但条件(2)不充分
- B 、条件(2)充分,但条件(1)不充分
- C 、条件(1)和(2)单独都不充分,但条件(1)和条件(2)联合起来充分
- D 、条件(1)充分,条件(2)也充分
- E 、条件(1)和(2)单独都不充分,条件(1)和条件(2)联合起来也不充分
- 6 【问题求解】已知△ABC和满足,则△ABC与,的面积之比为()。
- A 、
- B 、
- C 、2:3
- D 、2:5
- E 、4:9
- 7 【问题求解】已知三角形ABC的三个顶点A(-1,-2),B(2,-1),C(-2,1),则此三角形为()。
- A 、非等腰直角三角形
- B 、等边三角形
- C 、等腰直角三角形
- D 、钝角三角形
- E 、以上结论均不正确
- 8 【问题求解】已知a+b+c=0,abc =8,则的值()。
- A 、大于零
- B 、等于零
- C 、大于等于零
- D 、小于零
- E 、小于等于零
- 9 【问题求解】已知△ABC和△A’B’C’满足AB:A’B’=AC:A’C’=2:3,∠A+∠A’=π,则△ABC和△A’B’C’的面积比为()。
- A 、
- B 、
- C 、2:3
- D 、2:5
- E 、4:9
- 10 【条件充分性判断】已知点A(-2,0),点B(0,2),则ΔABC的面积的最大值是3+。() (1)点C为圆上的一动点 (2)点C为圆上的一动点
- A 、条件(1)充分,但条件(2)不充分
- B 、条件(2)充分,但条件(1)不充分
- C 、条件(1)和条件(2)单独都不充分,但条件(1)和条件(2)联合起来充分
- D 、条件(1)充分,条件(2)也充分
- E 、条件(1)和条件(2)单独都不充分,条件(1)和条件(2)联合起来也不充分
热门试题换一换
- We know through painful experience that freedom is never given by the oppressor; it must be( )by the oppressed.
- 大嘴鲈鱼只在有鲦鱼出现并且长有浮藻的水域里生活。漠亚河中没有大嘴鲈鱼。 从上述断定能得出以下哪项结论()。 Ⅰ.鲦鱼只在长有浮藻的水域中才能发现; Ⅱ.漠亚河中既没有浮藻,又发现不了鲦鱼; Ⅲ.如果在漠亚河中发现了鲦鱼,则其中肯定不会有浮藻。
- 沿江高铁某段由西向东设置了五个站点,已知:(1)扶夷站在灏韵站之东、胡瑶站之西,并与胡瑶站相邻;(2)韭上站与银岭站相邻。 如果韭上站与灏韵站相邻并且在灏韵站之东,则可以得出()。
- 受多元文化和价值观的冲击,甲国居民的离婚率明显上升。最近一项调查表明,甲国的平均婚姻存续时间为8年。张先生为此感慨,现在像钻石婚、金婚、白头偕老这样的美丽故事已经很难得,人们淳朴的爱情婚姻观一去不复返了。 以下哪项如果为真,最可能表明张先生的理解不确切()。
- 某公司去年初开始实施一项“办公用品节俭计划”,每位员工每月只能免费领用限量的纸笔等各类办公用品。年末统计时发现,公司用于办公用品的支出较上年度下降了30%。在未实施该计划的过去五年间,公司年平均消耗办公用品10万元。公司总经理由此得出:该计划去年已经为公司节约了不少经费。 以下哪项如果为真,最能构成对总经理推论的质疑()。
- An Asian engineer is assigned to aU.S. laboratory and almost suffers a nervous breakdown. A U.S. executive tellshis staff he's going to treat them fairly—andcreates dissension. A Japanese manager is promoted by his American president,but within six months asks for a transfer. Each of these real-life casesinvolved people who were regarded as superior employees, but were ill-equippedto cope with the complexities and dangers of intercultural management. "Multinational companies have studied everything else, nowthey're finally looking at culture", says Clifford Clarke, founder andpresident of the California-based IRI International Inc. "Never show theshoe to an Arab, never arrive in time for a party in Brazil, and in Japan,don't think ‘yes' means ‘yes',"advise U.S. consultants Lennie Copland and Lewis Brown Griggs, who haveproduced a series of films and a book to help managers improve theirinternational business skills. But simply learning the social "do's"and "don'ts" is not the answer, according to the new culturespecialists. The penalties for ignoring different thinking patterns, they pointout, can be disastrous.
- 经过细致筛查,在实验室的阴极实验后,实验室原本真空的密封小室里出现了许多粒子,这些粒子是X粒子,Y粒子和Z粒子。经过统计,所有X粒子都是Y粒子,只要是Y粒子就具有放射性,只有Z粒子才是瞬间湮灭的;Y粒子都不是Z粒子。在进一步统计,X粒子一共16M;Y粒子一共24M,Z粒子一共7M。 根据以上统计,以下哪项必然真,除了()。
- In the filmThe Devil Wears Prada, Priestly scolds her unattractive assistant for imaginingthat high fashion doesn't affect her. Priestly explains how the deep blue colorof the assistant's sweater descended over the years from fashion shows todepartment stores and to the bargain bin in which the poor girl doubtless foundher garment. This top-down conception of thefashion business couldn't be more out of date or at odds with the feverishworld described in Overdressed, Elizabeth Cline's three-year condemnation of "fastfashion". In the last decade, advances in technology have allowedmass-market labels to react to trends more quickly and anticipate demand moreprecisely. These labels encourage style conscious consumers to see clothes asdisposable and to renew their wardrobe every few weeks. By offering on-trenditems at dirt- cheap prices, these brands have hijacked fashion cycles, shakingan industry long accustomed to a seasonal pace.
- From the fourth paragraph we learn that().
- (20)
- Which of the following is NOT true according to the author?
亿题库—让考试变得更简单
已有600万用户下载