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【单选题】
下列关于锈蚀的说法中不正确的是( )
A.
主要是化学锈蚀
B.
有些金属生锈后对内部有保护作用
C.
属于物理现象
D.
锈蚀的速度空气湿度有直接关系
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举一反三
【单选题】A decrease in the expected price level shifts short-run aggregate supply to the
A.
right, and an increase in the actual price level shifts short-run aggregate supply to the right.
B.
right, and an increase in the actual price level does not shift short-run aggregate supply.
C.
left, and an increase in the actual price level shifts short-run aggregate supply to the left.
D.
left, and an increase in the actual price level does not shift short-run aggregate supply.
【判断题】When firms internalize a negative externality, the market supply curve shifts to the left
A.
正确
B.
错误
【单选题】中国高速铁路动车组的英文缩写是()。
A.
CRH
B.
CAH
C.
CBH
D.
CDH
【单选题】The short-run aggregate supply curve shifts leftward when the
A.
price level increases.
B.
general level of technology advances.
C.
money wage rate increases.
D.
availability of on-the-job training expands to all workers.
【单选题】关于 R 质粒,错误的叙述是:( )
A.
均是接合性耐药质粒
B.
可通过转化方式获得
C.
可由 RTF 和 r-det 整合而成
D.
可通过转导方式获得
【判断题】十九大报告第三部分指出,实践没有止境,理论创新也没有止境。( )
A.
正确
B.
错误
【单选题】下列动物细胞中,染色体数目、种类与受精卵相同的是
A.
精原细胞、体细胞
B.
体细胞、次级卵母细胞
C.
精子、卵细胞
D.
初级精母细胞和次级卵母细胞
【简答题】时值等于一个四分音符的六连音,应该使用6个( )分音符,并标记“6”。
【单选题】NaCl 等渗当量系指与 1g ( )具有相等渗透压的 NaCl 的量
A.
葡萄糖
B.
药物
C.
氯化钾
D.
注射用水
【单选题】When a sales tax is imposed on sellers, the supply curve shifts so that the vertical distance between the old and the new supply curve equals the
A.
sales tax multiplied by the price elasticity of demand.
B.
sales tax multiplied by the price elasticity of supply.
C.
amount of the sales tax.
D.
sales tax divided by the price elasticity of demand.
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