问题
单项选择题
下列哪项是维持胸内负压的必要条件是（）
A.胸廓畸形
B.肺内压低于大气压
C.呼气肌收缩
D.吸气肌收缩
E.胸膜腔密闭
答案
参考答案：E
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下列哪项是维持胸内负压的必要条件是（）
A.胸廓畸形
B.肺内压低于大气压
C.呼气肌收缩
D.吸气肌收缩
E.胸膜腔密闭
参考答案：E
| 完形填空。 When you are invited to meal in Thailand, the words of the invitation mean "Come and eat rice." In fact, nearly all Thai dishes are 1 with rice, which grows there very easily 2 the climate (气候) is warm and there is much rain. The food that is served is 3 cut into pieces, so there is no need to use knives and forks, instead, special spoons and forks are used. The Thais 4 to eat with their hands and now there are still some people who eat this way. There is a special 5 of doing it. First they wash their 6 hands in a bowl of water-they only eat with their right hands. They are careful not to let the food 7 the palms (手掌心) of their hands. After the meal, the 8 are again carefully washed. The meal usually has several different dishes. They are all hot. They are served in bowls which everyone shares, 9 each person has their own bowl of 10 . As Thailand has a long coastline (海岸线), it is not surprising that fish and shellfish play an important part in Thai's cooking. | |||
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