甲减的病理特征是()。
A.黏多糖在组织和皮肤堆积,表现为黏液性水肿
B.以上都不对
C.低渗导致细胞内水肿
D.组织凹陷性水肿
E.高渗导致细胞外水肿
参考答案:A
Which of the following statements about hypothesis testing is most accurate()
A. The probability of a Type I error is equal to the significance level of the test.
B. If you can disprove the null hypothesis, then you have proven the alternative hypothesis.
C. To test the claim that X is greater than zero, the null hypothesis would be Ho : X>0.
计算预产期的最可靠依据是
A..基础体温测定
B.开始早孕反应的日期
C.末次月经第1日
D.开始胎动的日期
E.妇科检查确诊早孕日期