方程x2-3x+4=0的根的情况是（） A．有一个实数根 B．有_爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题选择题

方程x²-3x+4=0的根的情况是（　　）

A．有一个实数根

B．有两个相等的实数根

C．没有实数根

D．有两个不相等的实数根

答案

∵a=1，b=-3，c=4，

∴△=b²-4ac=（-3）²-4×1×4=-7＜0，

∴方程没有实数根．

故选C．

阅读理解

		Antz is a movie that shows young kids how to work as a team. It shows however small a part they may have, what matters most is the team outcome of that small-small effort they all put to make things happen. It tells them never ever to give up the dream and never ever to accept failure. It tells about an ant that is never known by its size but by its team.
		Forrest Gump tells a story of a boy who stands for friends and has a strong will power. He never throws his life for chance but makes the best out of it. This story will make your kids feel sure about themselves and their abilities, making them brave enough to stand up to any challenges.
		Lion King is an American animated (动画的）musical adventure film produced by Wall Disney Feature Animation. The movie will show your kids the importance of having friends in one’s life.
		Dumbo will give your child wings to imagine without any boundaries. He doesn’t have to be logical every time. He has to understand that it’s the mental strength rather than the physical strength that brings out the best out of everything. Free for parents who come to see the film with their child.
		As a parent we are always caring about our kids but sometimes it’s not helpful for their growth. Finding Nemo, an animated film produced by Walt Disney Feature Animation， shows us how to teach them to overcome their fear by trying things，failing and bouncing back again for the/ry.
		The director brings out the best of the characters in the movie Toy Story. The movie portrays the emotions of the toys. How beautifully the emotions like friendship，togetherness ，leadership，love，care and so on have turned up in this movie!

小题1:According to the text, the film Forrest Gump is aimed at improving the viewers’ _____.

B．self-confidence

C．imagination

小题2:How much do they have to pay if eight-year-old Jason goes to see the film Dumbo with his parents?

小题3:Who are the main target audience of the movies mentioned in the text?

小题4:What emotions have appeared in the film Toy Story EXCEPT__________?

C． leadership

D． Generosity

单项选择题

“书破万卷方成攀柱妙手，冰冻三尺始有扑鼻花香。”这副对联告诉我们（）

①量变在事物发展过程中居于支配地位

②量变是质变的前提和必要准备

③量变必然引起事物性质的变化

④要重视量的积累，从点滴做起

A.①③

B.②④

C.①④

D.②③