皮皮学，免费搜题
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【单选题】
诊断呼吸衰竭最有意义的指标是A.
发绀
B.
呼吸困难
C.
心动过速、血压下降
D.
烦躁不安
E.
.PaO2<60mmHg 和（或） PaaCO2>50mmHg
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参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【多选题】下列哪些是电磁波/光波干涉现象在现代科技中的应用
A.
检测精密零件的平整程度
B.
测光的波长或比较光的波长
C.
利用光的干涉现象可以测量微小的厚度
D.
利用多波束雷达定位
【单选题】--There will be a 40% discount today. --__________.
A.
It's a real bargain.
B.
I'd like to pay by my VISA card.
C.
Thank you.
【单选题】James: Hey, Elleen, this handbag is a real bargain. It's only $24.95. Eileen: Only $24.95? ______
A.
You have money.
B.
It costs a lot.
C.
I don't think I can afford it.
D.
It's worth the money.
【多选题】下列哪些是电磁波/光波干涉现象在现代科技中的应用.()
A.
检测精密零件的平整程度
B.
测光的波长或比较光的波长
C.
利用光的干涉现象可以测量微小的厚度
D.
测量曲面的曲率半径
【单选题】James: Hey, Eileen, this handbag is a real bargain. It's only $ 24.95. Eileen: Only $ 24. 95? ______
A.
You have money.
B.
It costs a tot.
C.
I don't think I can afford it.
D.
It's worth the money.
【单选题】--There will be a 40% discount for you. It's 160 pounds. --__________.
A.
Thank you.
B.
It's a classic one, most ladies like this.
C.
It's a real bargain. I'll take it.
【简答题】拱桥的桥长是指拱上侧墙与（）间两伸缩缝外端之间的长度。
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