【简答题】求图8.1所示周期函数的拉氏变换. 求下列函数的拉氏逆变换(像原函数),并用另一种方法加以验求下列函数的拉氏逆变换(像原函数),并用另一种方法加以验证.
【单选题】一项公共物品是否值得生产,主要是看( )
【判断题】在缮制海运提单时,被通知人(NOTIFY PARTY)一栏在L/C下按规定填写,若未规定则填开证申请人,若L/C规定两个或两个以上的通知人应全部填上。
【单选题】From the passage we can draw a conclusion that if we want to keep healthy, we should______.
A.
only eat an apple a day
C.
take as many vitamin pills as possible
D.
throw something into our stomachs slowly and carefully