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【简答题】
一质点作半径为0.1 m的圆周运动，其角位置的运动学方程为：【图片】，则 t=1s 时，其切向加速度大小为【图片】 【图片】（说明，单位（【图片】）已给，答案不能用科学计数法表示，只能用数值表示，小数点后保留1位小数，小数点用英文输入法输入，如：2.3)
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反馈参考答案：
举一反三
【单选题】Refer to Figure 3. To internalize the externality in this market, the government should
A.
impose a tax on this product
B.
provide a subsidy for this product
C.
forbid production
D.
produce the product itself
【简答题】十一制足球场球门的宽是( )米,高是( )米。
【单选题】Refer to Figure 9-3. With trade, China will
A.
import 100 pencil sharpeners.
B.
import 250 pencil sharpeners.
C.
export 150 pencil sharpeners.
D.
export 250 pencil sharpeners.
【单选题】Figure 9-6 Refer to Figure 9-6. Without trade, the equilibrium price of carnations is
A.
$8 and the equilibrium quantity is 300.
B.
$6 and the equilibrium quantity is 200.
C.
$6 and the equilibrium quantity is 400.
D.
$4 and the equilibrium quantity is 500.
【单选题】Figure 9-4. The domestic country is Nicaragua. Refer to Figure 9-4. With trade, Nicaragua
A.
imports 150 calculators.
B.
imports 250 calculators.
C.
exports 100 calculators.
D.
exports 250 calculators.
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