静定结构在支座移动时,结构产生()。
A.内力
B.反力
C.位移
D.变形
参考答案:C
A: Are you free on Monday? B: No, I'm sorry, I'm busy.()Wednesday?
A.Would you like
B.What about
C.Why don’t you
风湿性心脏病二尖瓣病变时肺血管的改变是()
A.肺充血
B.肺出血
C.肺淤血
D.肺栓塞
E.肺缺血