[单项选择]根据室间隔缺损的血流动力学改变首先引起
A. 右心室增大
B. 右心房增大
C. 肺动脉段扩张
D. 左心室增大
E. 左心房增大

鲁艺有限责任公司是一家成立时间较长的大型建筑工程公司，有在海外承揽大型工程的丰富经验。目前，该公司打算开拓南美市场，但经过分析后，拟进入的国家政局不稳，并且国内经济恶化，通货膨胀率十分严重，而且政变后新上台的军政府不承认前任政府的所有签署的相关协议，另外，外汇管制十分严格。
因此，该公司决定放弃此地区市场，转而进军中东市场。由于公司资质很好，很顺利地承揽到了为中东某国修建高速公路这一工程。由于工期长，且有“尾款”，并以当地货币结算，在汇出时再按当时牌价折算成美元。该公司为防止业主拖欠工程款，向中信保投保了信用险，为防止汇率波动影响公司最后利润，公司财务部使用相关衍生产品进行对冲，锁定大部分工程款汇率。
根据以往同业经验，当工程结束时，工程指挥部使用的奔驰车，工程中使用的日本施工机械等，该国海关会以各种借口扣留在本国，但公司认为几年工程下来，这些设备已大幅度减值，不能因小失大，因此，不再为此而进行其他运作。
要求：
请根据上述材料，指出鲁艺公司面临的主要风险及相应的应对策略。

Black death that drove Newton from his college and into a momentous discovery, (1) England in 1665. Astronomical records of the time show that (2) was a year of intense sun-spot activity, and studies of annual tree (3) , which are wider when the sun is disturbed (4) that the terrible plague of 1348 was (5) accompanied by an active sun.
This sounds incredible, (6) we now have evidence that the sun has a direct effect on some of our body (7) . Over 120 ,000 tests made on people in a Black Sea (8) to measure the number of lymphocytes in their blood. These small cells normally (9) between 20 and 25 percent of man’s white blood cells, but in years of great solar activity this (10) decreases. There was a biff drop during the sunspot years of 1986 and 1987, and number of people (11) from diseases caused by a lymphocyte deficiency (12) doubled during the tremendous solar explosion of Februa
A. formation
B. explosion
C. eruption
D. propulsion