题目

The teachers were very(给……留下极深的印象) by your performance in the exam. 答案：【1】impressed下列可称为组织的是    ①肝脏②心脏③血液④皮肤⑤骨组织⑥神经元 [     ]A．①②③B．③④⑥C．③⑤⑥D．②④⑤