关于群落演替的叙述，错误的是

将下列无机盐与缺乏症相匹配

含钙的无机盐  ____    A、铁锌性贫血

含铁的无机盐  ____    B、地方性甲状腺肿

含碘的无机盐  ____   C、生长发育不良，味觉发生障碍

含锌的无机盐  ____   D、厌食、肌无力、骨痛等

含磷的无机盐  ____   E、佝偻病、骨质疏松

用动词的适当形式填空。
⑴In class, every student in our class ____  (take) notes carefully
⑵–Do you think whether the book called Harry Porter is worth ____  (read)?  - Yes, of course.
⑶ I called you yesterday afternoon, but you were out. - Oh, I ____ (watch) a football match on the playground.
⑷ Can you hear the two boys ____  (argue) with each other right now?
⑸The person we talked about ____  (visit) our school next week..

人体不同器官的体液会保持相对稳定的酸碱度范围。由下表可知：以下叙述中正确的是(   )

体液	血液	唾液	胃液
pH	7.35～7.45	6.6～7.2	0.9～1.5

I can dance，____ (但是)he can't．