肺毛细血管压大于何值时，可出现急性肺水肿（）
A.20mmHg
B.25mmHg
C.30mmHg
D.40mmHg
E.50mmHg
参考答案：C
解析：PAOP正常值为5～16mmHg，均值为9mmHg如果SI降低，PAOP<8mmHg可能存在低血容量，如果SI低，PAOP>12mmHg可能反映左心功能衰竭，PAOP>30mmHg反映存在急性肺水肿
| 用方框内所给词的适当形式完成短文。 | |
How are you? I have (1) ________ interesting to tell you. Last weekend we had a trip to Mount Tai. On Saturday we (2) ________ to Tai'an, a city at the (3) ________ of the mountain. We had a good rest at a hotel. At about six o'clock early next morning, we began (4) ________ the mountain. It took us (5) ________ than three hours to arrive at the top. All the mountain was covered with forests (被森林覆盖). "Look! The sun is going to rise!" Somebody ________ (6). We all turned and looked towards the (7) ________. Soon half of the sky turned white and a big, red ball was rising slowly from the sea. A few minutes later, all the world became (8) ________.We stayed on the top and had a great time. After lunch we went down. We got to our hotel at about four in the afternoon. Though (虽然) we were (9) ________, we were very happy. Thank you very much for your last letter and the (10) ________ Australian stamps. Hope to hear from you soon. Yours, Meimei |