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【单选题】
pH玻璃电极和SCE组成工作电池，25℃时测得pH=6.18的标液电动势是0.220V，而未知试液电动势Ex=0.186V，则未知试液pH值为（）。A.
7.6
B.
4.6
C.
5.6
D.
6.6
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举一反三
【单选题】I have told him several times that these young pines ______ watering twice a week.
A.
require
B.
appeal
C.
demand
D.
request
【单选题】I paid __ money that I borrowed from him there years ago.
A.
twice as many as
B.
twice the size of
C.
twice the amount of
D.
more than twice
【简答题】下列常用作静脉切开的血管是
【单选题】千斤顶属于( )螺旋传动形式。
A.
螺母固定，螺杆旋转并移动
B.
螺母轴向固定但旋转，螺杆轴向移动
C.
螺杆固定，螺母旋转并移动
D.
螺杆轴向固定但旋转，螺母移动
【单选题】— I telephoned him twice and I couldn’t get through to him. —The line might have been out of order, _______?
A.
don’t you
B.
wasn’t it
C.
do you
D.
hadn’t it
【单选题】—I telephoned him twice and I couldn’t get through to his home. —I think the line might have been out of order, ________?
A.
don’t you
B.
wasn’t it
C.
do you
D.
hadn’t it
【单选题】女性, 62 岁,最近发现乳房有一肿块直径约1厘米直径质硬,表面不光滑,与皮肤及深部组织无粘连,初步诊断是
A.
纤维腺瘤
B.
乳管内乳头状瘤
C.
乳房结核
D.
乳癌
E.
乳房囊性增生病
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