当梁的跨度为4---6m时,其架立钢筋的直径不小于()。
A、8mm;
B、10mm;
C、12mm;
D、14mm。
参考答案:B
Why will Bob and Sarah write a letter to the dean about the computer center
A. To ask for permission to use it at special hours.B. To get the broken computers removed.C. To complain about the technical assistant.D. To request additional computers and longer hours.
有一台变压器的型号为S10-M-1600/6,额定容量为()。