Macroevolution refers to the change process of taxa of species and above on a long time scale. This time scale is usually measured in millions of years.
A: 正确
B: 错误
A: 正确
B: 错误
举一反三
- Macroevolution refers to the change process of taxa of species and above on a long time scale. This time scale is usually measured in millions of years. A: 正确 B: 错误
- Any investigation which covers a long _______ of time is bound to encounter certain special problems. A: rank B: span C: scope D: scale
- Arithmetic operations are appropriate for A: only the ratio scale B: only the interval scale C: the nominal scale D: None of the above answers is correct.
- When to remove scale from the cooling spaces， acid solution （） in the system can be tested from time to time by putting some on to a piece of lime.
- When dimensioning the size which is not made of full scale, we need calculate the dimension figure carefully according the scale. A: 正确 B: 错误