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【单选题】
设总体X服从N , 其中 已知,但 未知,而 为它的一个简单随机样本,则下列量中( )是统计量A.
①③⑥
B.
① ③④⑤ ⑥
C.
① ③④ ⑥
D.
①② ③④⑤ ⑥
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举一反三
【单选题】Directions: In this section, you will hear three passages. At the end of each passage, you willhear three or four questions. Both the passage and the questions will be spoken only once. After you hear...
A.
They tend to be nervous during interviews.
B.
They often apply for a number of positions.
C.
They worry about the results of their applications.
D.
They search extensively for employers' information.
【单选题】患者男,25岁。患肺结核半年,入院后为配合治疗,应给予( )[单选题]
A.
高蛋白、高热量饮食
B.
高脂肪、高热量饮食
C.
高热量、低脂肪饮食
D.
低盐、高蛋白饮食
E.
高热量、低蛋白饮食
【简答题】Going to a new school can feel like starting all over again. Y ou may feel like sad or angry about leaving your old school or friend. You may feel excited about a new beginning or a “fresh start”. You...
【单选题】男性患者,25岁,患肺结核半年,入院后为配合治疗,应给予
A.
高脂肪、高热量饮食
B.
高蛋白、高热量饮食
C.
高热量、低脂肪饮食
D.
低盐、高蛋白饮食
E.
高热量、低蛋白饮食
【单选题】患者男性,25岁,患肺结核半年,入院后为配合治疗,应给予
A.
高蛋白、高热量饮食
B.
高脂肪、高热量饮食
C.
高热量、低脂肪饮食
D.
低盐、高蛋白饮食
E.
高热量、低蛋白饮食??
【单选题】患者男,25岁。患肺结核半年,入院后为配合治疗,应给予
A.
高蛋白、高热量饮食
B.
高脂肪、高热量饮食
C.
高热量、低脂肪饮食
D.
低盐、高蛋白饮食
E.
高热量、低蛋白饮食
【单选题】Section C Directions: In this section, you will hear three passages.At the end of each passage, you will hear three or four questions. Both the passage and the questions will be spoken only once. Afte...
A.
They tend to be nervous during interviews.
B.
They often apply for a number of positions.
C.
They worry about the results of their applications.
D.
They search extensively for employers' Information.
【单选题】下列哪条叙述与盐酸普鲁卡因的性质不符
A.
易溶于水几乎不溶于乙醚
B.
与亚硝酸钠反应后遇碱性β-萘酚试液产生猩红色沉淀
C.
水溶液加硫酸铜试液及碳酸钠试液呈蓝紫色
D.
水溶液在酸、碱性中均易水解
E.
水溶液容易发生氧化反应使颜色加深
【单选题】听力原文：W: Are you sure that we'll be safe? M: Take it easy. All the ski runs are carefully marked. And anything that might be dangerous, like a cliff or something, is enclosed by a fence. W: I'm still n...
A.
At a park.
B.
At a skiing resort.
C.
At a stadium.
D.
At a hotel at the foot of a mountain.
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