生活中，没有根、茎、叶等器官的分化，光合作用效率约占全球绿色植物光合作用效率的90%，此类植物是（　　）

A．苔藓植物

B．藻类植物

C．蕨类植物

D．种子植物

—"Where is your mother?"

—"_____" [ ]

A. She works in a factory.

B. She is in the kitchen, she's cleaning.

C. She is a teacher in No.1 Middle School.

D. She 1ikes watching TV .