float ( )
A: a covering that
hides all or part of the face.
B: a booth used by
a merchant to show and sell goods.
C: a box in which a
dead person is buried.
D: to rest on the
surface of a liquid without sinking, or drift in a gas such as air
without falling.
A: a covering that
hides all or part of the face.
B: a booth used by
a merchant to show and sell goods.
C: a box in which a
dead person is buried.
D: to rest on the
surface of a liquid without sinking, or drift in a gas such as air
without falling.
举一反三
- Which of the following statements is not correct? A: Medical research can be an example of a<br/>public good. B: The private market will tend to undersupply<br/>public goods. C: The free-rider problem occurs when a good is<br/>nonexcludable. D: All goods provided by the government are<br/>public goods.
- ( )deep down in the earth or thousands of years ,the dead ore g has rotted<br/>away<br/>and become coal. A: Buried B: Burying C: Having<br/>buried D: Having<br/>been buried
- A<br/>gas enclosed in a cylinder by means of a piston that can move without<br/>friction is warmed, and 1000 J of heat enters the gas. Assuming that<br/>the volume of the gas is constant, the change in the internal energy<br/>of the gas is [] A: 0 B: 1000<br/>J C: -1000<br/>J D: None<br/>of the above
- We<br/>learn from the conversation that people A: cannot<br/>Jive without the internet. B: cannot<br/>work without the internet. C: all<br/>use the internet to keep in touch. D: have<br/>varied opinions about internet use.
- If an economy is producing<br/>efficiently, then ____ A: there is no way to produce<br/>more of one good without producing less of another good. B: it is possible to produce<br/>more of both goods without increasing the quantities of inputs that<br/>are being used. C: it is possible to produce<br/>more of one good without producing less of the other. D: it is not possible to<br/>produce more of any good at any cost.