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问题 单项选择题

门静脉高压症形成后首先出现的病理改变是

A．食管胃底静脉出血

B．肝肿大

C．腹水

D．脾肿大

E．交通支扩张

答案

参考答案：D

解析：门静脉高压症是因门静脉血流受阻，血液淤滞引起的，当门静脉血流受阻后，首先出现脾充血和脾肿大。

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Kofi Annan says helping survivors of last week’ s earthquake and (1) in the Indian Ocean is (2) . The United Nations secretary- general says countries that have offered aid must (3) and provide it. The offers add up to around (4) dollars. United Nations officials say (5) of that is needed during the next six months. The concern about offers of international aid is (6) . For example, the earthquake in Barn, Iran, in (7) of 2003 killed more than (8) people. Countries and groups offered hundreds of millions of dollars (9) .The United Nations says it has (10) only about (11) dollars in aid received so far. Governments and organizations that offered help (12) that, however. On (13) Mr. Annan met with world leaders in Jakarta, Indonesia to discuss aid for (14) . The leaders discussed and (15) the idea of (16) owed by affected nations. But the leaders did not say they would do so. Some said that (17) to survivors would be more helpful. Representatives of (18) countries and international organizations attended the meeting in Jakarta. Officials say they will cooperate to develop (19) for the Indian Ocean and the (20) .
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变压器的额定容量是指变压器在（）电压和（）电流下连续运行所输送的容量。
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