【单选题】从总体均值、方差为已知的任一有限总体中随机抽取样本含量大小为n的样本,下列正确的是
A.
当n足够大时,样本均值量的分布近似服从正态分布
B.
只有当n<30时,样本均值的分布近似服从正态分布< /div>
【单选题】Although trying his best, he still couldn't ______ Jesse, who is the best in the class. [ ]
【单选题】听力原文:W: Isn't this the best team in England? M: Yes, of course. But they aren't playing very well today. What do we learn about the dialogue?
A.
The best team in England play very well every time.
B.
This isn't the best team in England.
C.
Today the best team in England are not playing as well as before.
【简答题】A.She is the best swimmer in the city. B.She shouldn't try to be the best. C.If she persist, she can be the best. D.The city has awarded her “best swimmer”.
【多选题】下列关于气雾剂的叙述,错误的是 ( )
A.
气雾剂主要通过肺部吸收,吸收的速度很快,不亚于静脉注射
C.
小分子化合物易通过肺泡囊表面细胞壁的小孔,因而吸收快
D.
吸人气雾剂起效迅速的原因主要是由于肺部的吸收面积巨大
E.
通常吸入气雾剂的药物微粒大小在1~10um范围内最适宜
【多选题】下列关于气雾剂的叙述,错误的是( )
A.
气雾剂主要通过肺部吸收,吸收的速度很快,不亚于静脉注射
C.
小分子化合物易通过肺泡囊表面细胞壁的小孔,因而吸收快
D.
吸入气雾剂起效迅速的原因主要是由于肺部的吸收面积巨大
E.
通常吸入气雾剂的药物微粒大小在1~10μm范围内最适宜
【单选题】I don’t think he is the best man to do the job.