It puts out ___________ lumens, that's twice as much as a common LED.
A. 1200
B. 1400
C. 1600
D. 1800
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Which statements are true when fixing a car?
A. Holding a light with your chin is inconvinient.
B. Plus the cord would runs all over your fender.
C. Plus the cord would scratches your paint.
D. Common lights get really hot and they can burn you.
下列菜肴属湖南菜的一组是( )
A. 麻辣子鸡、腊味合蒸、佛跳墙、清蒸水鱼
B. 麻辣子鸡、腊味合蒸、松仁鱼米、黄焖鱼翅
C. 麻辣子鸡、腊味合蒸、祖庵鱼翅、东安仔鸡
D. 祖庵鱼翘、佛跳墙、红烧全狗、三蛇龙虎会
假定在完全竞争的要素市场上生产要素价格、产品价格和产品的边际收益均等于4元，且此时厂商得到了最大利润，则生产要素的边际产量为（）
A. 2
B. 1
C. 4
D. 不可确知
若厂商在完全竞争的产品市场上经营，其生产要素中唯有A是可变要素，则该厂商对A要素的需求曲线可由（）推出
A. MP曲线
B. MC曲线
C. VMP曲线
D. MR曲线
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