化学是一门以实验为基础的科学,根据题中实验要求,请选择合适的实验操作,将其标号填

题型:填空题

问题:

化学是一门以实验为基础的科学,根据题中实验要求,请选择合适的实验操作,将其标号填入对应的空格中。

序号实验目的实验方法
证明米汤中含有淀粉 
证明碳酸钠溶液呈碱性 
除去Fe2O3中的Al2O3 
证明粗盐中含有少量Ca2+ 
供选择的实验操作:

A.加入Na2CO3溶液,观察现象

B.用玻璃棒蘸取溶液点在pH试纸中部,对照比色卡           

C.加入碘水,观察溶液颜色变化

D.加入氢氧化钠溶液,过滤

考点:物质的分离离子的检验粗盐的提纯
题型:填空题

心理发展的基本性质包括()。

A.心理发展的整体性

B.心理发展的社会性

C.心理发展的活动性

D.心理发展的规律性

题型:填空题

B

He was an old man who fished alone in a boat in the Gulf Stream and he had gone eighty-four days now without taking a fish. In the first forty days a boy had been with him. But after forty days without a fish the boys parents had told him that the old man was now definitely salao and he finally would be so. The boy had gone at their orders in another boat which caught three good fish the first week. It made the boy sad to see the old man come in each day with his skiff empty and he always went down to help him carry either the coiled lines or the gaff(鱼钩) and harpoon(鱼叉) and the sail that as rolled around the mast(桅杆). The sail was patched with flour bags and, rolled, it looked like the flag of permanent defeat.

The old man was very thin with deep wrinkles in the back of his neck. The brown blotches(斑点) of the skin cancer the sun brings from its reflection on the tropic sea were on his cheeks. The blotches ran well down the sides of his face and his hands had the deep-creased scars from handing heavy fish on the cords. But none of these scars were fresh. They were as old as erosions in a fishless desert. Everything about him was old expect his eyes and they were the same color as the sea and were cheerful and undefeated.

“Santiago,” the boy said to him as they climbed the bank from where the boat was pulled up. “I could go with you again. We’ve made some money.” The old man had taught the boy to fish and the boy loved him.

“No,” the old man said. “But we have. Haven’t we?

“Yes,” the boy said. “Can I offer you a beer on the Terrance and then we’ll take the stuff home.”

“Why not?” said the old man, “between fisherman.”

55. The underlined word “salao” in the first paragraph probably means ________.

A. lonely               B. unlucky             C. selfish               D. stubborn

56. The boy left the old man and went in another boat to fish because _______.

A. the old man preferred to fish alone  B. the old man was poor

C. the boy’s parents ordered him to     D. the old man’s sail suggested a permanent defeat

57. After reading this passage, we may safely conclude that ________.

A. the old man was insistent and not afraid of failure

B. the boy’s papa had confidence in everything

C. the old man caught big fishes because he had some doubts about the old man

D. the boy obeyed his father because he had some doubts about the old man

58. What might happen after the last paragraph?

A. The old man and the boy might go to fish with other fishermen.

B. The old man might go to have a drink with the boy.

C. The old man and the old might go to enjoy beer at the old man’s home.

D. The old man might go to tell the boy’s papa about the secrets between fishermen.

题型:填空题

政府对公众的电子政务不包括______。

A.教育培训服务
B.就业服务
C.公民信息服务
D.电子邮递服务
E.交通管理服务

题型:填空题

服药方法,汤剂一般宜()

A.温服

B.热服

C.冷服

D.小量频服

E.温开水吞服

题型:填空题

IPC

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