皮皮学，免费搜题
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【简答题】
下面是某科学兴趣小组的同学做同周期元素性质递变规律实验时，设计的一套实验方案。其中实验步骤如下 请整理并完成实验报告。 (1)实验目的：________。 (2)实验用品：试剂：金属钠，镁条，铝条，稀盐酸，新制氯水，新制Na 2 S溶液，AlCl 3 溶液，NaOH溶液等。仪器：①____，②______，表面皿，试管夹，镊子，小刀，玻璃片，砂纸等。 (3)实验内容：（完成下列表格中的实验现象和化学方程式，实验步骤略） (4)实验结论：________。 (5)请用原子结构的知识简单解释上述结论：_______________。
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皮皮学刷刷变学霸
举一反三
【单选题】两肩,多脂肪和“满月脸”——面圆脖子粗,脸色深红晦暗有疮疤;躯体厚实、肥胖,但四肢不胖。该症状产生的原因是
A.
甲状腺功能亢进症
B.
肾上腺皮质功能减退
C.
肾上腺皮质亢进
D.
甲状腺功能减退
E.
生长激素过多
【单选题】Sentences: Direction: Choose the choice that best expresses the highlighted sentence. ( 4x5=20 points, 20% ) Jeremy Bentham was an English philosopher. He proposed many legal and social reforms which ...
A.
Bentham's legal and social proposals had a great influence.
B.
Bentham influenced many proposals on social and legal reforms.
C.
Bentham proposed many legal and ethical reforms.
D.
Bentham was influenced by social and legal reforms.
【单选题】三、阅读理解 O. Henry was a pen name used by an American writer, William Sydney Porter. He was born in North Carolina in 1862. As a young boy he lived an exciting life. He did not go to school for very long...
A.
school
B.
bank
C.
newspaper
【单选题】O. Henry was a pen name used by an American writer, William Sydney Porter. He was born in North Carolina in 1862. As a young boy he lived an exciting life. He did not go to school for very long, but h...
A.
North Carolina
B.
South Carolina
C.
West Carolina
【单选题】依次填写关联词都正确的是( ) 我以为她一定最安全了, 不做门房, 不是小孩子, 生得不好看, 颈子上还有许多炙疮疤。
A.
因为 也 又 而且
B.
既 也 又 而且
C.
因为 又 也 况且
D.
既 又 也 况且
【单选题】三、阅读理解 O. Henry was a pen name used by an American writer, William Sydney Porter. He was born in North Carolina in 1862. As a young boy he lived an exciting life. He did not go to school for very long...
A.
people thought he had stolen money from the bank
B.
he broke the law by not using his own name
C.
he wanted to write stories about prisoners
【单选题】三、阅读理解 O. Henry was a pen name used by an American writer, William Sydney Porter. He was born in North Carolina in 1862. As a young boy he lived an exciting life. He did not go to school for very long...
A.
18
B.
19
C.
20
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