构件正常工作时,应满足的条件是( )。
A.构件具有足够的承载力,刚度和稳定性
B.构件具有足够的抵抗变形的能力
C.构件原有形式下的平衡是稳定的
D.构件不发生断裂破坏
参考答案:A
根据下面一段对话内容,从7个选项中选出能填入空白处的最佳选项,其中有两项为多余选项。
B: () I’m going to ask you a few questions. Then we are going to have a short conversation in English. Do you understand
A.You must have wronged me.
B.Oh! I’m so sorry about this.
C.Please stop just a second.
D.Are you Mr. Smith
E.But may I ask you something first
F.Is there anything I can do for you
G.Now, sit down please.
人体弓形虫病临床上多表现为()
A.急性弓形虫病
B.慢性弓形虫病
C.隐性感染
D.脑积水
E.胎儿畸形