A:光合作用需要光才能进行,并释放氧气
B:光合作用的条件之一是光,产物有淀粉
C:光合作用的产物是淀粉和氧气
D:光合作用的条件是光和叶绿体
7∶4和 17 ∶ 14 可以组成比例。
We believe the public services in our city are good, and we are working hard to make it even .
如图,用手指压塑料尺,可以观察到尺发生弯曲.对于此现象,说法错误的是( )
That raised the costs of Medicare, ______ represented 15% of the federal funds last year.