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【多选题】
研究二种不同高血压药物疗效,把高血压 120名患者随机分为2个治疗组,每组服用不同高血压药,分别服用3个月后测定其血压值(数据分布呈正态分布,方差齐),并观察血压变化值来评价效果,两组药物疗效观察宜选用的统计分析方法有A.
设计t检验
B.
方差分析
C.
配对计量资料t检验
D.
行×列表卡方检验
E.
两个率比较的卡方检验
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举一反三
【单选题】We’re getting married next month, and then we’re going to Venice on our __________.
A.
honeymoon
B.
known
C.
bride
D.
vacation
E.
romantic
【单选题】Harvey finished—— his research paper, but he nceded to check it before submitting it to the professor
A.
to type
B.
typed
C.
typing
D.
type
【单选题】Harvey finished ______ his research paper, but he needed to check it before submitting it to the professor.
A.
to type
B.
typed
C.
type
D.
typing
【单选题】某《英汉辞典》在解释“bus”时，列出的义项有①公共汽车②火箭的一级③火车车厢④公共马车。如果按照历史上这些含义出现的先后来编写辞条，那么正确的排序应当是（）
A.
①③④②
B.
③②①④
C.
④①③②
D.
④③①②
【单选题】Harvey finished ______ his research paper, but he needed to check it before submitting it to the professor.
A.
to type
B.
typed
C.
typing
D.
type
【单选题】Harvey finished ____ his research paper, but he needed to check it before submitting it to the professor.
A.
to tape
B.
typed
C.
typing
D.
type
【单选题】Harvey finished( )his research paper, but he needed to check it before submitting it to the professor.
A.
typing
B.
to type
C.
typed
D.
type
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