心房收缩期在心血管生理上的意义是（）

A.心房的血液因心房收缩，最终全部被充盈到左心室

B.心房收缩期是等容收缩期

C.心房收缩期使仍处于舒张状态的心室得到进一步充盈

D.心房收缩是舒张期的开始

E.左心房收缩引起左心室收缩

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) .