问题
单项选择题
有关COPD患者急性发作期持续低流量吸氧的主要原因，下列不正确的是（）
A.低流量吸氧可以有效改善患者的氧合
B.低流量吸氧可以防止PaCO迅速增加
C.低流量吸氧在COPD患者比正常人可以更有效地提升Pao
D.COPD患者红细胞的携氧能力增强
E.使COPD患者体内的氧在组织释放增加
答案
参考答案：C
搜题请搜索小程序“爱下问搜题”
有关COPD患者急性发作期持续低流量吸氧的主要原因，下列不正确的是（）
A.低流量吸氧可以有效改善患者的氧合
B.低流量吸氧可以防止PaCO迅速增加
C.低流量吸氧在COPD患者比正常人可以更有效地提升Pao
D.COPD患者红细胞的携氧能力增强
E.使COPD患者体内的氧在组织释放增加
参考答案：C
Directions: There are 4 passages in this part. Each of the passages is followed by 5 questions or unfinished statements. For each of them there are 4 choices marked A, B, C and D. Choose the best one and mark your answer on the ANSWER SHEET with a single line through the center.
Passage One
| Andrea had never seen an old lady hitchhiking before. However, the weather and the coming darkness made her feel sorry for the lady. The old lady had some difficulty in climbing through the car door, and pushed her big brown canvas shopping bag down onto the floor under her feet. She said to Andrea, in a voice that was almost a whisper, "Thank you dear - I’m just going to Brock Bourne" Something in the way the lady spoke, and the way she never turned her head, made Andrea uneasy about this strange hitchhiker. She didn’t know why, but she felt instinctively that there was something wrong, something old, and something dangerous. But how could an old lady be dangerous It was absurd. Careful not to turn her head, Andrea look sideways at her passenger. She studied the hat, the dirty collar of the dress, the shapeless body, and the arms with their thick black hairs. Thick black hairs Hairy arms Andrea’s blood froze. This wasn’t a woman. It was a man. At first, she didn’t know what to do. Then suddenly, an idea came into her racing, terrified brain. Swinging the wheel suddenly, she threw the car into a skid, and brought it to a halt. "My god!" she shouted. "A child! Did you see the child I think I hit her. " The "old lady" was clearly shaken by the sudden skid. "I didn’t see anything dear," she said. "I don’t think you hit anything. " "I am sure it was a child!" insisted Andrea. "Could you just get out and have a look Just see if there is anything on the road" she held her breath. Would her plan work It did. The passenger slowly climbed out to investigate. As soon as in front of her vehicle, Andrea gunned the engine and accelerated madly away, and soon she had put a good three miles between herself and the awful hitchhiker. It was only then that she thought about the bag lying on the floor in front of her. Maybe the bag would provide some information about the real identity about the man. Pulling into the side of the road, Andrea opened the heavy bag curiously. It contained only one item — a small hand axe, with a razor-sharp blade. The axe, and the inside of the bag, were covered with the dark red stains of dried blood. Andrea began to scream. |
Andrea allowed the hitchhiker to take a ride in her car, mainly because ______.
A．the hitchhiker was an old woman
B．she was curious about the old lady
C．the lady had a heavy bag
D．she knew the old lady