属于吲哚乙酸类的为
A．吲哚美辛B．阿司匹林C．吡罗西康D．保泰松E．布洛芬
参考答案：A
The book has been well received, but _________ actual sales, it hasn’t been very successful.
A．in terms of
B．in need of
C．in favour of
D．in honor of
无效假设应是
A．样本均数与总体均数相同
B．样本来自差数为零的总体
C．两样本差别有显著性
D．两样本抽样误差不相同
E．两样本标准误相同
