第20题: [单项选择]关于肺灌注显像错误的是()。 A. 显像时需弹丸注射以观察血流灌注 B. 一般采用多体位,必要时也可断层显像 C. 99mTc-MAA是一过性嵌顿,肺毛细血管或肺小动脉重症患者应慎重检查 D. 99mTc-MAA是一种蛋白颗粒 E. 99mTc-MAA的直径大于肺毛细血管的直径 参考答案:A
A. to express his disappointment B. to call for a strengthening of UN intervention C. to urge council members to reach a consensus on Kosovo D. to introduce new measures of UN intervention 参考答案:B 答案解析:[听力原文] 29-30 East Timor is expected to be a leading topic in New York this week. Leaders from