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【多选题】
可见一紫外吸收分光光度计接通电源后，指示灯和光源灯都不亮，电流表无偏转的原因有()。A.
电源开关接触不良或已坏
B.
电流表坏
C.
保险丝断
D.
电源变压器初级线圈已断
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】按控制作用分,低压电器可分为执行电器、( )、( )和保护电器。
【单选题】Consider the cornfield with soil that had an amino sugar N content of 350 mg/kg in Study 2. Based on Figure 2 and other information provided, was the soil in the cornfield responsive or nonresponsive?
A.
Responsive, because the yield did not increase.
B.
Responsive, because the yield increased.
C.
Nonresponsive, because the yield did not increase.
D.
Nonresponsive, because the yield increased.
【单选题】Consider the amino acid shown below. The configuration about which atom will determine whether the amino acid is in the D or L configuration?
A.
如图
B.
如图
C.
如图
D.
如图
【单选题】下列关于浅昏迷的描述错误的是
A.
BP、P、R多无变化
B.
吞咽、咳嗽反射存在
C.
压迫眶上神经有痛苦表情
D.
大声呼唤可睁眼,但不能回答
E.
大小便失禁或潴留
【单选题】Consider the amino acid shown below. The configuration about which atom will determine whether the amino acid is in the D or L configuration? 以下所示的氨基酸,哪个原子的构型将决定氨基酸是 D还是L的构型?
A.
如图
B.
如 图
C.
如图
D.
如 图
E.
如图。
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