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【判断题】
决定跑速的主要因素是步长和后蹬力量A.
正确
B.
错误
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反馈参考答案：
举一反三
【判断题】ADSL系统的基本原理是“不对称”，即在下行方向传送高速数字信号（可高达6.144Mbit/s甚至更高），而在上行方向用户侧Modem工作在较低速率（512kbit/s～1Mbit/s）。这样可以保证用户侧的串音比对称传输系统低很多，从而确保传输距离。
A.
正确
B.
错误
【单选题】When people specialize in the activity in which they have a comparative advantage,
A.
there cannot be a division of labor, though production will increase.
B.
there will likely be a division of labor as well as an increase in output.
C.
there will be a gain from trade, but production will not be increased.
D.
there will likely be a division of labor, and output will stay the same.
【简答题】“”科学构想首先在( )得以实现。
【判断题】A comparative advantage exists when a country can produce something more cheaply and/or of higher quality than any other country.
A.
正确
B.
错误
【判断题】When countries specialize in production in which they have a comparative advantage, more goods and services can be produced and consumed.
A.
正确
B.
错误
【简答题】U202 Grammar -- AS When it is used as a conjunction, AS can mean A) when / while, B) though / although, C) since / because, D) in the way / mannar that, etc., and it can also be E) used in a comparat...
【单选题】When each person specializes in producing the good in which he or she has a comparative advantage, total production in the economy
A.
falls.
B.
stays the same.
C.
rises.
D.
may fall, rise, or stay the same.
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