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【简答题】
为什么薄钢板或小直径钢材比厚板或大直径钢材的强度高，即为什么GB50017—2003要对钢材以板厚分组区别其强度？
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反馈参考答案：
举一反三
【单选题】—Amy,I called you yesterday evening,but nobody answered the phone. —Oh,I a walk with my mother at that time. [ ]
A.
take
B.
took
C.
am taking
D.
was taking
【单选题】— Hello, Jackey. I rang you up at this time yesterday evening, but nobody answered. — Oh, I _____ the shopping in the supermarket with my mother. [ ]
A.
was doing
B.
do
C.
did
【单选题】轻度缺氧时 , 血气分析 PaO2 指标为
A.
10.1--13.33kPa PaO2(lkPa=7.5mmHg)
B.
9.97--12.65 kPa PaO2
C.
6.65--933kPa PaO2
D.
4.66--6.67 kPa PaO2
E.
3.55--4.88 kPa Pao2
【单选题】—How was your job interview? —Oh，I couldn’t feel _______．I hardly found ______ answers to most of the questions they asked．
A.
better，exact
B.
easier，adequate
C.
worse，proper
D.
happier，urgent
【单选题】— I called you yesterday evening, but nobody answered the phone. — Oh, I a walk with my parents at that time.
A.
took
B.
was taking
C.
am taking
D.
take
【简答题】HXD3型电力机车转向架采用滚动抱轴承( )结构,二系采用高圆螺旋弹簧。
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