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【单选题】
下列关于感受器电位的描述，错误的是（）A.
具有局部电位的性质
B.
与动作电位的发生部位是分开的
C.
与启动电位无本质区别
D.
一般能真实反映外界刺激携带的信息
E.
一旦产生即表明感受器功能完成
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皮皮学刷刷变学霸
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.
【多选题】大比例尺地形图是指( )的地形图。
A.
1 ： 500
B.
1 ： 5000
C.
1 ： 2000
D.
1 ： 10000 ； E . 1 ： 100000 （中） *1 ： 100 万为小比例尺地图
E.
1 ： 100000
【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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