皮皮学，免费搜题
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【单选题】
脑疝的急救处理不对A.
静脉大量补液纠正水电解质失调
B.
静脉快速注射脱水剂
C.
保持呼吸道通畅，给氧
D.
密切观察意识、瞳孔、生命体征
E.
做好急症开颅手术准备
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举一反三
【简答题】下列情况应采用什么方法测定硬度?写出硬度值符号。 (1) 锉刀 (2) 黄铜铜套 (3) 硬质合金刀片 (4) 供应状态的各种碳钢钢材 (5) 耐磨工件的表面硬化层
【单选题】Why does distance always have to be measured from the nearest scale on a Mercator chart? ______
A.
Because it is the most efficient way
B.
Because it varies with the change of latitude
C.
Because it varies with the change of longitude
D.
Because it is the most straight line
【简答题】布氏硬度法和洛氏硬度法各有什么优缺点?各适用于何种场合。下列情况应采用哪种硬度法测定其硬度? 库存钢材;锻件 ;锉刀; 台虎钳钳口; 硬质合金刀头;黄铜轴套; 供应状态的各种碳钢钢材; 硬质合金刀片。
【单选题】Why are scientists studying dart-poison frogs?
A.
To develop new drug therapies.
B.
To learn how to reverse the effects of their poison.
C.
To discover how to breed them successfully in captivity.
D.
To help repopulate the species.
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