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【单选题】
豨莶草不具有的功效是A.
消肿
B.
降血压
C.
祛风湿
D.
清热解毒
E.
通经络
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举一反三
【多选题】下列关于标准差σ,说法正确的是( )。
A.
σ值愈大,曲线愈平坦,即随机变量的分散性愈大;
B.
标准差σ 刻划总体的分散程度。
C.
标准差σ是评定算术平均值的可靠性指标。
D.
σ值愈小,曲线愈尖锐(集中),随机变量的分散性愈小。
【简答题】心动周期中,主动脉压最高见于:
【单选题】Part C. Directions : You will hear three dialogues or monologues. Before listening to each one ,you w/// have 5 sec-onds to read each of the questions which accompany /t. While listening ,answer each ...
B.
,
C.
or
D.
. After listening ,you will have 10 seconds to check your answer to each question. You will hear each piece once only. Questions 11-13 are based on the following talk about prodigies, kids with unusual natural a-bilities. You now have /5 seconds to read Questions 11-13. 11. What was John Stewart Mill? [A] A historian. [B] A composer. [C] A philosopher. [D] A mathematician.
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