【多选题】影响儿童社会性行为的因素有哪些? ( )
【判断题】一次截取两个结点为研究对象,来计算桁架杆件轴力的方法称为结点法。( )
【判断题】工程上某些受力的构件,如钢筋、链条及钢绳等,常常是通过一定的塑性变形或通过加工硬化来提高其承载能力的。
【判断题】工程上某些受力的构件,如钢筋、链条及钢绳等,常常是通过一定的塑性变形或通加工硬化来提高其承载能力的。( )
【简答题】我常常试图解释为何旅游对我有巨大的吸引力。
【单选题】听力原文:W: I'm here to apply for a credit card. I expect to travel a lot this year and a card will be useful. M: Certainly. Please fill in this application. We need a few details for our records. W: I al...
A.
There's a special offer for account holders.
B.
She believes it will be convenient on trips.
C.
The bank is waiving annual fees.
D.
An old card has expired.
【简答题】信号点灯常用电源变压器用什么型号变压器?