下列离子方程式书写正确的是() A.澄清石灰水与少量小苏打溶液混合:Ca2+ +

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问题:

下列离子方程式书写正确的是(  )

A.澄清石灰水与少量小苏打溶液混合:Ca2+ + 2OH- + 2 HCO3-= CaCO3↓+ CO32- + 2H2OB.向A1C13溶液中加入过量的氨水:Al3++4NH3·H2O=AlO2+4NH4++2H2O
C.Ba(OH)2溶液中滴入少量的NaHSO4溶液:Ba2+ 2OH+ 2H+ SO42= BaSO4↓+ 2H2O
D.向NH4HSO4稀溶液中逐滴加入Ba(OH)2稀溶液至刚好沉淀完全:
Ba2+ + 2OH- + NH4+ + H+ + SO42- =  BaSO4↓+ NH3·H2O + H2O

考点:离子方程式
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一个小灯泡,正常发光时两端的电压是6V,通过灯丝的电流是200mA,如果把它接到9V的电源上,且使它正常发光,应将一个允许通过的电流不小于______A,阻值为______Ω的电阻与灯串联即可.

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It is reported that six Chinese ships have entered waters near islands claimed by both China and Japan. China said the ships were carrying out “law enforcement” to demonstrate its jurisdiction(管辖权) over the islands, known as Diaoyu in China and Senkaku in Japan. At least two of the ships left after the Japanese coast guard issued a warning, Japanese officials say.

The action came after Japan sealed a deal to buy three of the islands from their private Japanese owner. Japan controls the uninhabited but resource-rich East China Sea islands, which are also claimed by Taiwan.

The Japanese Coast Guard said the first two Chinese boats entered Japan’s territorial waters at 06:18 local time, followed by another fleet of four other ships just after 07:00. The first two ships then left the area. A third ship left later on Friday morning, one report said. No force was used, Japanese officials added. “Our patrol(巡逻) ships are currently telling them to leave our country’s territorial waters,” the coastguard said in a statement.

The Chinese foreign ministry confirmed that its ships were there. “These law enforcement and patrol activities are aimed to demonstrate China’s jurisdiction over the Diaoyu Islands and ensure the country’s maritime interests,” a statement said.

The US has called for “cooler heads to be accepted” as tension worsens between China and Japan over the islands. US Defense Secretary Leon Panetta is going to visit both Japan and China from this weekend as part of a tour of the region.

The dispute(争端) has seriously damaged diplomatic relations between China and Japan and threatens to damage the strong trading relationship, says the BBC’s John Sudworth in Beijing. The dispute has also caused strong nationalist emotions on both sides that makes it very difficult to be seen to be backing down, says our reporter.

The Japanese government says it is buying the islands to promote their stable and peaceful management. China on the other hand, says the islands have historically been its territory and fishing grounds. Meanwhile Japan’s newly-appointed ambassador to China, Shinichi Nishimiya, remains in hospital in Tokyo. He was appointed on Tuesday to replace Uichiro Niwa, who has been criticized for his dealing with the worst diplomatic dispute between Japan and China in recent years.

小题1:The Diaoyu Islands are actually inhabited(居住) by              .

A.Japan

B.China

C.Taiwan

D.Nobody小题2:Which of the following is TRUE?

A.Japan fired at the 6 Chinese ships to warn them to leave the waters.

B.China admitted that the 6 ships had been forced to leave the waters.

C.The US called on both sides to calm down.

D.Shinichi Nishimiya was unconscious(昏迷的) in the hospital because somebody attacked him.小题3:Why was Uichiro Niwa replaced?

A.He isn’t iron(强硬) enough in dealing with the diplomatic disputes between Japan and China.

B.His health condition is not good enough to work there.

C.He didn’t do well in dealing with the diplomatic dispute about the Diaoyu Islands.

D.He criticized the Chinese government publicly in an improper way.小题4:This news report is most likely to be selected from the              newspaper.

A.British

B.Chinese

C.Japanese

D.American

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穿越时空隧道,假设你是一名美国人,处在20世纪初,要到中国来,你可选用的交通工具有

①火车②轮船③汽车④飞机[ ]

A.①②③④

B.②③④

C.③④

D.①②

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持证人张某逾期未到原发证部门校验《合格证》,其《合格证》()。

A.继续有效

B.自行作废

C.自动失效

D.缓期校验

E.继续校验

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蒸汽凝液系统开车所需的条件有()。

A、凝液罐液面达50%

B、一萃精馏部分开始加热

C、二萃精馏部分开始加热

D、蒸汽凝液系统循环管线设定

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