下列离子方程式中,正确的是 A.铜跟硝酸银溶液反应:Cu+Ag+====Cu2+

题型:选择题

问题:

下列离子方程式中,正确的是

A.铜跟硝酸银溶液反应:Cu+Ag+====Cu2++Ag

B.小苏打溶液与稀硫酸混合:CO32+2H+====CO2↑+H2O

C.大理石溶液于醋酸:CaCO3+2H+="===" Ca2++CO2↑+H2O

D.CuSO4溶液与Ba(OH)2溶液混合:Cu2++ SO42+Ba2++2OH="==" BaSO4↓+Cu(OH)2

考点:离子方程式
题型:选择题

Once upon a time, a poor traveller stopped under a tree. From his bag he took out a bowl of  小题1:  (boil) rice and started to eat. Nearby was a small shop, where a woman was selling fried fish to travellers able to pay for   小题2: . When the man finished eating and got up to leave, she shouted, “You have not paid me for your meal!”

“But I ordered nothing from you!” he said.

“Everyone can see that you enjoyed the smell of my fried fish with your rice,”    小题3:    (argue) the woman. “If you hadn’t smelt the fish, your meal would not have been so   小题4:__ (please)!”

Soon a crowd gathered.   小题5:  they supported the traveller, they also agreed that the wind was blowing from the shop to the place  小题6:  he had eaten, carrying the smell of the fried fish to him.

At last, the woman took him to a judge and after  小题7:  (tell) the judge the story, she insisted that   小题8:  the man had enjoyed her fish smell, he should pay 25 cents. After hearing the evidence, the judge asked the man to drop   小题9:  25-cent coin on the ground. “Here is your payment, the sound of 25 cents   小题10:  the smell of the fried fish.”

题型:选择题

薄荷脑是指下列哪种结构的化合物()

A.

B.

C.

D.

E.

题型:选择题

磷脂交换蛋白

题型:选择题

以下关于报文摘要的叙述中,正确的是()

A.报文摘要对报文采用RSA进行加密

B.报文摘要是长度可变的信息串

C.报文到报文摘要是多对一的映射关系

D.报文摘要可以被还原得到原来的信息

题型:选择题

工程咨询单位的评估,有利于帮助银行理清贷款项目的工艺方案和投资估算的______。

A.准确性
B.科学性
C.合理性
D.公正性

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