不定项选择乐句内部可以没有乐汇的结构。
单项选择题The WRONG description below is A、Apoptosis activates caspases, a family of intracellular proteases. B、Apoptosis is indispensable for development of immune system. C、Apoptosis is induced only by the interaction of Fas and Fas ligand. D、Apoptosis is responsible for the development of neural system of a human. E、Apoptosis doesn’t rigger inflammation in the surrounding tissue.