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【单选题】
关于动作电位特性的正确描述是?A.
动作电位的幅度不随刺激强度而改变
B.
动作电位会发生时间总和
C.
动作电位会发生空间总和
D.
动作电位的幅度与刺激强度成正比
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举一反三
【单选题】Refer to Figure 2-6. If this economy put all available resources into the production of bananas, it could produce
A.
200 bananas and also 150 baseballs.
B.
300 bananas and also 100 baseballs.
C.
400 bananas and no baseballs.
D.
It is impossible to know unless we know the quantity of resources available. Figure 2-6
【单选题】【图片】Refer to Figure 4-2. At a price of $4, there is a
A.
surplus of 3 units.
B.
surplus of 6 units.
C.
shortage of 3 units.
D.
shortage of 6 units.
【单选题】Refer to Figure 2-6. What is the opportunity cost to society of the movement from point A to point C?
A.
50 baseballs
B.
100 baseballs
C.
100 bananas
D.
300 bananas Figure 2-6
【单选题】【图片】Refer to Figure 4-2. At a price of $12, there is a
A.
surplus of 1 unit.
B.
surplus of 2 units.
C.
shortage of 1 unit.
D.
shortage of 2 units.
【单选题】Refer to Figure 2 . If the price of the good is $14, then producer surplus is
A.
$17.
B.
$22.
C.
$25.
D.
$28.
【单选题】Refer to Figure 2 . Curve A is U-shaped because of
A.
diminishing marginal product.
B.
increasing marginal product.
C.
the fact that increasing marginal product follows decreasing marginal product.
D.
the fact that decreasing marginal product follows increasing marginal product.
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