问题
单项选择题
分隔肺毛细血管血与肺泡气之间的组织有（）
A.肺泡上皮基膜和肺泡上皮
B.肺毛细血管内皮及其基膜和组织间隙
C.血管弹力纤维
D.肺血管肌层
E.上述A和D
答案
参考答案：E
搜题请搜索小程序“爱下问搜题”
分隔肺毛细血管血与肺泡气之间的组织有（）
A.肺泡上皮基膜和肺泡上皮
B.肺毛细血管内皮及其基膜和组织间隙
C.血管弹力纤维
D.肺血管肌层
E.上述A和D
参考答案：E
| 完形填空。 | ||||
| Soon it would be the holidays, but before that, there were year exams. All the (1) ______ had been working hard for some time, reviewing their lessons for the exams. If they didn't (2) ______, they would have to retake them in September. There were usually a few who (3) ______, but Jane didn't want to be one of them. She had worked hard all year, (4) ______ just before the exams she was working so hard that her sister Barbara was (5) ______ about her. She went to bed too (6) ______. The night before the first exam, Barbara (7) ______ that she have an early night and take a (8)_____ pill. She promised to wake (9) ______ up in the morning. As she was falling asleep, Jane was afraid that she might oversleep. Her (10) ______ kept jumping from subject to subject. At last, with the help of (11) ______, she went to sleep. In no time at all, she was sitting in the examination hall, looking at the examination (12) ______, but she couldn't answer any of the questions. (13) ______ around her was writing pages and gages. (14) ______ she thought hard, she couldn't find anything to write (15) ______. She kept looking at her (16) ______. Time was running out. There was only an hour to go. She started one question, wrote two sentences, (17) ______ and tried another one. With only half an hour left she wrote another two sentences. By this time she was so worried that she started (18) ______. Her whole body shook. It shook so much that she (19) ______ up. She was still in bed and it had all been a (20) ______ dream. A minute later, Barbara called her name. | ||||
|