高钙血症导致
A.高镁血症
B.尿镁降低
C.尿镁增加
D.高磷血症
E.尿锌增加
参考答案:C
解析:高血钙时增加尿镁排出。
How many months ____________ in a year? [ ]
A. are there
B. is there
C. have
D. were there
两个不为0的数相除,被除数和除数同时除以相同的数(0除外),商不变。[ ]