细胞内液绝大部分存在于（）。
A.心肌中
B.骨骼肌中
C.平滑肌中
D.泌尿系统中
E.消化系统中
参考答案：B
We __________ so tired. We've only been to a party.
A．mustn't have felt
B．wouldn't have felt
C．shouldn't have felt
D．couldn't have felt
3月龄患儿，近2月睡眠不宁，烦躁，多汗，时有惊跳。体检：前囟大，肺部未闻及啰音。此时最有助于诊断的血液检验是（）
A.血常规
B.血液酸碱度
C.血钾、钠、氯测定
D.血钙、磷、碱性磷酸酶
E.血镁测定
