我国省级行政区的设立,始于()A.尧舜时期的禅让制 B.西周的分封制 C.秦朝的郡县

题型:单项选择题

问题:

我国省级行政区的设立,始于()

A.尧舜时期的禅让制

B.西周的分封制

C.秦朝的郡县制

D.元朝的行省制

考点:高中历史高中历史题库
题型:单项选择题

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小题1:According to the advertisements, the four books are all intended for ______.

A.teachers

B.adults

C.children

D.women小题2:Some of the four books were illustrated in order to_________

A.make them suitable to different readers

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题型:单项选择题

已知:3CH4(g) + 2N2(g)3C(s) + 4NH3(g)  ΔH>0,在700℃,CH4与N2在不同物质的量之比[n(CH4)/n(N2)]时CH4的平衡转化率如下图所示:

下列说法正确的是

A.n(CH4)/n(N2)越大,CH4的转化率越高

B.n(CH4)/n(N2)不变时,若升温,NH3的体积分数会增大

C.b点对应的平衡常数比a点的大

D.a点对应的NH3的体积分数约为26%

题型:单项选择题

一位患者急诊入院,既往有胃溃疡病史,现腹部刀割样疼痛,呈板状腹型,该患的超声影像表现不包括()。

A.腹腔内见游离气体

B.局部胃肠管壁增厚

C.胃内较大强光团,后伴声影,可移动

D.小网膜囊局限性积液

E.腹腔内局限性积液

题型:单项选择题

生石灰烧伤后,以下哪种紧急处理方法最为妥当()

A.大量清水冲洗

B.用酸性中和液冲洗

C.先去除表面石灰,再用大量清水冲洗

D.简单包扎后到专科医院治疗

E.立即涂抹烧伤药

题型:单项选择题

造成雷达目标图像左右扩大的主要因素是()。

A、垂直波束宽度

B、水平波束宽度

C、脉冲宽度

D、脉冲重复频率

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