对分类资料各类别数值大小进行比较宜选用的统计图是______。
A.散点图 B.条图C.半对数线图 D.线图
参考答案:B
下列哪种疾病不适宜行单肺移植术()
A.慢性阻塞性肺疾病
B.原发性肺动脉高压
C.继发性肺动脉高压
D.特发性肺纤维化
E.支气管扩张症
With the development of science and technology,there is no doubt ________ Chinese astronauts will land on the moon in the near future.
A.whether
B.that
C.what
D.which