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【单选题】
如下图所示，某钢筋混凝土现浇肋形楼盖的次梁，跨中承受最大正弯矩设计值M＝115kN·m。混凝土强度等级为C30，纵向受拉钢筋采用热轧HRB335钢筋。楼板厚度h f ′＝80mm，次梁高度h＝450mm，宽度b＝200mm，纵向受力钢筋合力点至混凝土边缘的距离a s ′＝35mm。 若已知翼缘计算宽度b f ′＝1800mm，则按单筋T形截面计算的次梁跨中所需受拉钢筋计算截面面积最接近于（）mm 2 。A.
940
B.
1009
C.
1033
D.
1124
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【单选题】Dr. Trimble often heard students say that _________.
A.
their mind failed to work when faced with a test
B.
they had difficulty focusing on the test items
C.
they could not think of a way to get rid of test anxiety
D.
they began panicking well ahead of a test
【简答题】Connecting with Patients Dr. Paris often treats several generations of a family over many years. “He’s seen us through two births, one operation, multiple earaches, a broken wrist and a recovery from ...
【简答题】在万能卧式铣床上用三面刃铣刀铣削直角沟槽，若工作台零位未对准，铣出的直角沟槽会（）。
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