学进去-教育应平等而普惠
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限于篇幅仅展示1000道试题,请根据关键词精准搜索
下列关于元素周期表应用的说法正确的是
A.为元素性质的系统研究提供指导,为新元素的发现提供线索
B.在金属与非金属的交界处,寻找可做催化剂的合金材料
C.在IA、IIA族元素中,寻找制造农药的主要元素
D.在过渡元素中,可以找到半导体材料
类型:单选题
难度系数:容易0.94
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物质进入细胞都要穿过细胞膜,不同物质出入细胞膜的方式不同,下列各图表示一定范围内细胞膜外物质进入细胞膜内的三种不同情况。

请据图完成下列问题。
(1)据图指出A、B、C所表示的物质运输方式:A是________,B是________,C是________
(2)上述三种运输方式中,哪一种加入呼吸抑制剂后曲线会发生变化?______。为什么?____________________
(3)乙醇、CO2、氨基酸进入细胞的方式分别是__________________________
类型:非选择题
难度系数:容易0.94
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居里夫人患白血病,主要是因为
A.长期被放射线损伤
B.长期吸烟
C.环境污染
D.长期工作劳累.免疫力下降
类型:选择题
难度系数:容易0.94
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与正常人体细胞相比,癌细胞能(          
A.迅速衰老
B.迅速凋亡
C.迅速生长.分裂和转移
D.迅速分化和转移
类型:选择题
难度系数:容易0.94
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右下图是动物细胞示意图。请据图回答([ ]内填序号):

(1)此图是动物细胞,判断的依据是,有[ ]____,而无________________
(2)若这是昆虫的飞翔肌细胞,那么该细胞中的[ ]_______较多,因为该细胞的生理活动需要的能量多。
(3)若这是人体的胰腺腺泡细胞,那么与其合成功能直接相关的细胞器
[ ]______含量较多,该细胞器的形成与核内的[ ]__________有关。
(4)图中易被碱性颜料染成深色的是[ ]________,它由_________________两种成分组成。
(5)某种毒素妨碍细胞的有氧呼吸而影响生命活动,这种毒素可能作用于[ ]_______中。
(6)与细胞有丝分裂有关的是[ ]_________;内部含有多种水解酶且被称为“消化车间”的细胞器是[ ]_________
类型:非选择题
难度系数:容易0.94
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在成熟的植物细胞中,体积最大的细胞器是
A.线粒体B.液泡C.高尔基体D.叶绿体
类型:选择题
难度系数:容易0.94
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已知某化学反应的能量变化如图所示(a、b、c均大于0)。下列说法错误的是
A.若向反应中加入催化剂,a和b的值均减小
B.该图表示的反应热ΔH = (b - a) kJ·mol−1
C.参与反应的反应物总键能小于生成物总键能
D.已知石墨比金刚石稳定,则金刚石转化为石墨的能量变化与此图相似
类型:单选题
难度系数:容易0.94
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My beloved grandma, had never left Australia and now never would due to cancer.

Planted _______ in the armchair, she had no alternative but to “travel” via the travel program on TV. I _______ the sadness and thought hard. It finally _______ me that I could ask strangers on the internet for help. I _______ the post:

My Nanny has cancer and she will never see the world. Please send her postcards so she can see the world from her armchair. I can offer nothing but gratitude.

I _______ not to breathe a word of this; should nothing come, I couldn’t bear to carry her _______ along with my own. Days _______ weeks and Nanny’s health declined rapidly, my suffering growing unbearable.

Finally, about six weeks after my post, a dog-eared, _______ postcard from UK wandered into our humble little letterbox. It was to me a ray of light and from that day, our letterbox became the _______ for postcards from all over the world and a hotel, ________ travel-weary cards. My dream of armchair travels became a reality.

In the months that followed, thanks to those cards, my Nanny had a private “flight” to board, travelling far and wide, satisfied and ________ . Cancer could not stop us. Our very last flight ________ on a warm morning. My dearest travel ________ bought a different ticket for this trip and began to explore another world.

I have ________ from great loss, knowing that her journey ahead would be a brilliant one with so many ________ from the strangers.

1.
A.calmlyB.anxiouslyC.steadilyD.helplessly
2.
A.swallowedB.expressedC.sharedD.forgot
3.
A.impressedB.comfortedC.touchedD.hit
4.
A.put outB.looked throughC.showed offD.picked up
5.
A.agreedB.regrettedC.resolvedD.promised
6.
A.toleranceB.disappointmentC.annoyanceD.anxiety
7.
A.made upB.mixed upC.led toD.turned to
8.
A.travel-wornB.brand-newC.threateningD.puzzling
9.
A.stationB.destinationC.museumD.shop
10.
A.acceptingB.accommodatingC.deliveringD.attracting
11.
A.patientB.confidentC.gratefulD.peaceful
12.
A.survivedB.spedC.failedD.departed
13.
A.companionB.consultantC.attendantD.guide
14.
A.heardB.collapsedC.emergedD.benefited
15.
A.expectationsB.blessingsC.congratulationsD.cheers
类型:完形填空
难度系数:容易0.94
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若集合,则       
A.B.C.D.
类型:单选题
难度系数:容易0.94
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下列对应离子方程式的书写正确的是
A.将(少量)通入溶液中:
B.向溶液中滴加稀氨水:
C.向溶液中滴加少量稀盐酸:
D.向溶液中滴加少量澄清石灰水:
类型:单选题
难度系数:容易0.94
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