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【单选题】
按弯扭合成计算轴的应力时，要引入折算系数α，这系数α是考虑 。A.
轴上键槽削弱轴的强度
B.
合成正应力与切应力时的折算系数
C.
正应力与切应力的循环特性不同的系数
D.
正应力与切应力方向不同
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举一反三
【单选题】My grandmother had________ over 50, 000 when she was sixty- five years old.
A.
put away
B.
put back
C.
put out
D.
put down.
【单选题】My grandmother had a reverence for the sun, a holy regard that now is _____gong out of mankind.
A.
all
B.
all but
C.
anything but
D.
nothing but
【简答题】My grandmother had a 1———— for the sun, a holy regard that now is all but gone out of mankind. There was a 2———— in her, and an ancient awe. She was a Christian in her later years, but she had come a ...
【单选题】My grandmother had a reverence for the sun, a holy regard that nowis __________gone out of mankind.
A.
nothing but
B.
anything but
C.
all but
D.
no but
【单选题】Life was extremely hard in the past. My grandmother had no chance to go to school, even the ______ school.
A.
elemental
B.
elementary
C.
basic
D.
introductory
【单选题】中性点不接地系统的主要优点是
A.
发生单相接地时仍可继续向用户供电
B.
接地电流较大时,不会在接地点产生断续电弧
C.
接地电流较大时,不会使线路发生谐振过电压现象
D.
发生单相过电压时,不会继续向用户供电
【单选题】It’s true that the bad news had a bad ______ on my grandmother.
A.
affect
B.
instance
C.
taste
D.
Effect
【单选题】My grandmother had a reverence for the sun, a holy regard that now is all but gone out of mankind.
A.
respect
B.
ponder
C.
depression
D.
honor
【简答题】中性点不接地系统主要的优点是发生单相接地故障时的（），无需（）。
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