为证实低血糖患者有无胰岛素和C-肽分泌过多，应同时测定（）
A.T3T4
B.血浆葡萄糖
C.C-肽水平
D.胰岛素
E.血常规
参考答案：B, C, D
The company where I work is not as good as before, so the manager has decided to fire some
employees to ________ the expenses of his company.[ ]
A. cut off
B. cut away
C. cut up
D. cut down
关于标准差，表述正确的是
A．标准差的单位与原始数据的单位不相同
B．标准差的单位与原始数据的单位相同
C．同一资料的标准差一定比例数小
D．同一资料的标准差一定比均数大
E．标准差就是标准误
