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【单选题】
在采用直接标价的前提下，如果需要比原来更少的本币就能兑换一定数量的外国货币，这表明()。A.
本币币值上升，外币币值下降，通常称为外汇汇率上升
B.
本币币值下降，外币币值上升，通常称为外汇汇率上升
C.
本币币值上升，外币币值下降，通常称为外汇汇率下降
D.
本币币值下降，外币币值上升，通常称为外汇汇率下降
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举一反三
【单选题】Which option belongs to the electrical properties of the material?
A.
electrical conductivity
B.
heat capacity
C.
thermal conductivity
D.
elastic modulus
【单选题】Which of the following option is not the direct cause of the Tianjin explosion?
A.
Local drying of nitrocellulose in the container at the south side of the dangerous goods warehouse due to the loss of wetting agent
B.
Under the action of high temperature (weather) and other factors, the decomposition of nitrocellulose is accelerated to release heat, and the accumulated heat is self ignited
C.
The nitrocellulose and other dangerous chemicals in the adjacent containers burn in large area for a long time, resulting in the explosion of dangerous chemicals such as ammonium nitrate stacked in the arrival area
D.
Explosion of magnesium powder
【简答题】简述急性心肌梗死心电图的特征性改变
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