某医生选择适当资料计算相应指标,进行t检验。选择资料的类型属于()
A、计数资料
B、定性资料
C、等级资料
D、半定量资料
E、计量资料
参考答案:E
Generally, a farmer has more difficulty than a college graduate. [ ]
A. to earning livings
B. to ern his living
C. earning livings
D. earning his living
对于急性肺水肿诊断最特征的是()
A.气促、发绀、烦躁不安
B.P2亢进
C.奔马律
D.咯粉红色泡沫样痰
E.两肺哮鸣音