The nutrient cycles between the living and nonliving parts of an ecosystem are called______________.（ ）
A: physical cycles
B: chemical cycles
C: Biogeochemical Cycles
D: biological cycle
A: physical cycles
B: chemical cycles
C: Biogeochemical Cycles
D: biological cycle
C
举一反三
- For the following cycles, which belong to power cycles ( ) A: Reheat Cycle B: Regenerate Cycle C: Rankine Cycle D: Refrigeration Cycle
- When the disruption occured in the cycle, cycles were pushed back.
- The Chinese lunar calendar is based on the cycles of the moon.
- Here were cycles of industrial prosperity which always collapsed into industrial _____.
- Many thousands of proteins in a typical eukaryotic cell are regulated by cycles of phosphorylation and _______________.
内容
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2. The circadian rhythm can further _________ into routine cycles during the 24-hour day.
- 1
Lunar Calendar is based on the movement and cycles of the moon, which represents a linear concept of time.
- 2
The suspension was subjected _____ four cycles of freezing and thawing and was further disrupted _____ sonication (40 s).
- 3
The start of the Chinese luna year is based on the cycles of: A: the moon B: the sun C: the stars D: the weather
- 4
There are three cycles of Romance in Medieval English literature. They are matters of France, matters of Rome and matters of Denmark.