已知关于x的一元二次方程(12k-1)x2-(k+1)x+12k+1=0有实数根

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问题:

已知关于x的一元二次方程(
1
2
k-1)x2-(k+1)x+
1
2
k+1=0
有实数根,求实数k的取值范围.
考点:一元二次方程的定义一元二次方程根的判别式
题型:解答题

气胸()

A.气管无移位,语颤正常,肺部。叩诊实音,可闻及呼吸音

B.气管向患侧移,语颤正常,肺部叩诊浊音,呼吸音消失

C.气管向患侧移,语颤减弱,肺部叩诊浊音,呼吸音消失

D.气管向健侧移,语颤减弱,肺部叩诊浊音,呼吸音消失

E.气管向健侧移,语颤增强,肺部叩诊清音,呼吸音消失

题型:解答题

多发生于老年人的淋巴瘤类型包括()。

A.慢性淋巴细胞白血病/小淋巴细胞淋巴瘤

B.套细胞淋巴瘤

C.经典型霍奇金淋巴瘤

D.血管免疫母细胞性淋巴瘤

E.毛细胞白血病

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先通读下面的短文,掌握其大意,然后根据短文内容和所给首字母,在空格内填入一个适当的词,使短文意思完整。所填单词在答卷横线上必须完整写出。

I still remember visiting Moscow. It is the c  1  of Russia(俄罗斯), the b  2   country in the world. I go there with my parents at the age of eight. I live and study there for one year, I have some happy memories(记忆).

One of the most interesting things of that city is that ,t  3  are many dogs. Perhaps Russians l  4   dogs very much. You can see dogs here and there. Almost each of the families has a dog. I make friends with many Russian children w  5  I am living and studying there. They are all very nice. They have fair hair and fair skin. I play with them h  6  though(尽管)I can only speak a little Russian at first. They are f  7  to me. The weather in Moscow is very cold. It snows almost every day in w . The ground is always covered with a lot of snow. We often make snowmen t  9   .

Now I am b  10   in China, but I miss them so much. I will never forget my happy memories of this visit to Moscow.

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微波炉靠微波使食物内部分子产生剧烈运动而使食物本身发热,从而使食物内外受热均匀,不会出现外生内焦的现象;电磁灶利用“涡流”直接使锅底发热,使热量从食物外部传递到内部来完成烹调,较符合人们传统的烹调习惯,而且避免了热量传递过程中的损失,没有明火,卫生安全,这都优于电炉。

由此推不出的一项是()。

A.电炉不安全,不卫生,有明火

B.电炉的热量在传递过程中有损失

C.电磁灶与电炉一样,都会出现食物外焦内生的现象

D.电炉加热食物的原理与电磁灶一样

题型:解答题

刘某,女,34岁。有痫证病史16年。近1年来,痫证发作日益频繁,自觉发作后神疲乏力,平素头晕目眩,心悸,健忘,腰膝疫软,查舌苔腻,脉细弱无力。痫证日久不愈,神志恍惚,时时惊悸,或喜悲哭,宜选方()

A.百合地黄汤

B.甘麦大枣汤

C.天王补心丹

D.六味地黄丸

E.河车大造丸

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