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【多选题】
指数体系的作用主要有A.
以分析复杂现象总体数量总变动中各因素变动影响的程度和方向
B.
用各指数之间的联系可以进行指数间的相互换算
C.
可以分析总平均数的变动及受各因素变动影响的程度和方向
D.
可以对社会经济现象进行综合评价和测定
E.
可以反映现象在较长时间的发展变化趋势
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举一反三
【单选题】患者,男,50岁。高热持续不退2天,伴剧烈咳嗽,呼吸急促,发绀。体格检查:胸部听诊呼吸音减低,无肺实变征。该患者最可能的诊断是:
A.
典型流感
B.
轻型流感
C.
肺炎型流感
D.
胃肠型流感
E.
脑膜炎型流感
【简答题】设计文法,产生如下语言集合: 已知语言 L ={ w | w ∈ { a,b } * 且 w 中 a 的个数为偶数}
【单选题】The amount of advances may vary according to whether credit policy is tight or ___.
A.
slack
B.
loose
C.
free
D.
easy
【单选题】Which of theunderline expressions isthe hedging of the following sentences.For our present purpose, it is useful to distinguish two kinds of chemical reaction, according to whether the reaction releas...
A.
For our present purpose , it is useful to distinguish two kinds of chemical reaction, according to whether the reaction releases energy or requires it.
B.
For our present purpose, it is useful to distinguish two kinds of chemical reaction, according to whether the reaction releases energy or requires it.
C.
For our present purpose, it is useful to distinguish two kinds of chemical reaction, according to whether the reaction releases energy or requires it.
D.
For our present purpose, it is useful to distinguish two kinds of chemical reaction, according to whether the reaction releases energy or requires it.
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