题目内容

It's important for astronauts to exercise in order to keep their muscles fit.

A. Y
B. N
C. NG

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A．Bob is too tired to study any more.B．He told Bob not to study late at night.C．Bob di

A. Bob is too tired to study any more.
B. He told Bob not to study late at night.
C. Bob didn't hear the alarm.
D. He had often advised Bob to study.

Scientists aim to develop technology that can recognize psychological states.

A. Y
B. N
C. NG

某框架一剪力墙结构，抗震等级为一级，第四层剪力墙墙厚300mm，该楼面处墙内设置暗梁(与剪力墙重合的框架梁)，剪力墙(包括暗梁)采用C40级混凝土(ft=1.71N/mm2)，主筋采用HRB335(fy=300N/mm2)。试问，暗梁截面上、下的纵向钢筋，采用下列何组配置时，才最接近且又满足规程中的最低构造要求？

题21～22：某带转换层的框架一核心筒结构，抗震等级为一级；其局部外框架柱不落地，采用转换梁托柱的方式使下层柱距变大，如图4-23所示。梁、柱混凝土强度等级采用C40(ft=1.71N/mm2)，钢筋采用HRB335(fyv=300N/mm2)。
试问，下列对转换梁箍筋的不同配置中，其中何项最符合相关规范、规程规定的最低构造要求？