单项选择题

A．It is slowed by the process of photosynthesis.
B．It occurs only in certain areas.
C．It takes millions of years.
D．It is dependent on chemical compounds.
<上一题 目录 下一题>
热门 试题

单项选择题
A．She had hoped for a better conclusion.B．Her committee hasn’t been very busy lately.C．This committee is better than the other one.D．She is pleased with the results.
A．She had hoped for a better conclusion.
B．Her committee hasn’t been very busy lately.
C．This committee is better than the other one.
D．She is pleased with the results.
单项选择题
A．$175B．$ 50C．$125D．$ 225
A．$175
B．$ 50
C．$125
D．$ 225
相关试题