我国人群HBsAg阳性率平。均为10%,某地随机抽查了100人,其中HBsAg阳性20人。 H0为
A. 两样本阳性率相等
B. 两总体阳性率相等
C. 样本所在的总体率与已知总体率相等
D. 样本率与总体率不等
E. 样本所在的总体率>0.1
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M: Are you planning to buy a new car this yearW: A new car That’s impossible.I’ve just bought a new apartment. What does the woman mean()
A. She doesn’t live far away.
B. She won’t buy a car this year.
C. She hasn’t made up her mind.
D. She doesn’t like to drive.
Michael: The Johnsons are moving next week. We are going to have a going-away party for them Saturday.Tracy: I didn’t realize they were moving so soon. ______.Michael: Yes, but we’ll have one last chance to get together. We’re planning a barbecue.
A. Wish them a happy journey.
B. May they have a more comfortable home.
C. They are really going to be missed.
D. We can’t stay together forever, can we
治疗原发性肝癌气滞血瘀证应首选()
A. 四苓散合四物汤
B. 逍遥散合桃红四物汤
C. 茵陈蒿汤合桃红四物汤
D. 茵陈蒿汤合鳖甲煎丸
E. 滋水清肝饮合鳖甲煎丸
为反映两种或两种以上疾病的病死率随时间推移的变化趋势,应选用()
A. 条图
B. 直方图
C. 圆图
D. 半对数线图
E. 线图