较之净额结算，实时全额结算具有明显的效率和安全优势。（）
参考答案：对
The engine of the ship was out of order and the bad weather________ the helplessness of the crew at sea.
A．added to
B．resulted from
C．turned out
D．made up
表示病毒大小的常用单位（）。
A、cm
B、nm
C、mm
