具有输血指征需符合以下标准（） A.急性失血血红蛋白需下降20g_爱下问搜题

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问题单项选择题

具有输血指征需符合以下标准（）

A.急性失血血红蛋白需下降20g／L

B.慢性贫血血红蛋白低于80g／L

C.急性失血血容量减少大于20％

D.慢性失血血容量减少大于20％

E.慢性失血患者感觉头昏明显时

答案

参考答案：C

填空题

战国后期，泰国蜀守__________在成都附近的岷江上游，修建了卓越的水利都江堰。秦朝初年，为防御匈奴，修筑了西起__________，东到辽东，全长万余里的雄伟长城。

补全对话，情景问答

从方框中选择适当的句子补全对话（其中有两项多余）。

A. That's true.
B. Thank you very much.
C. McDonald's is too crowded.
D. Can I ask you some questions?
E. Why do you think so?
F. Why do you like KFC?
G. What about Pizza Hut?

A: Hello, I'm a reporter from the school newspaper.     1
B: Sure!
A: Which do you think is the best fast food restaurant in town, McDonald's, KFC or Pizza Hut?
B: McDonald's.
A:     2    B: McDonald's has the friendliest service.
A: But KFC is the cheapest and has the most delicious food.
B:     3    But KFC doesn't have new food.
A:     4
B: Well, Pizza Hut is the most comfortable, but it is also the most expensive.
A: I see.     5
B: You're welcome.