根据首字母及汉语提示，完成下列单词的拼写，使句意通顺。

小题1:Do you think this kind of water is s_____(安全) for drinking?

小题2:He is writing on the blackboard with a piece of c_____ (粉笔).

小题3:Our teachers are all very s_____ (严格) with us students.

小题4:Tom i_____ (邀请) all his best friends to his birthday party last Sunday.

小题5:We have to d_____ (携带) a lot of books in our school bags every day.

容量失调仅引起

A．细胞内液量的改变
B．细胞外液量的改变
C．体液量的改变
D．渗透压保持恒定
E．渗透压发生改变