A:that; what
B:which; which
C:which; what
D:that; which
把陈述句换成把字句
①我终于取出了装在书包里的小人书。
②妈妈不小心摔坏了小芳的文具盒。
既是生态系统的主要成分,又能自己制造有机物的生物是( )