The box is full and heavy.A．True.B．False.

下列FPRTRAN77表达式中，值为.TRUE.的是（)。（A) .NOT..FALSE..AND..NOT..TRUE．（B) .FALSE..OR..NOT

The man can carry the box.A．True.B．False.

Big Ben is the name of a clock.A．True.B．False.

The English in the U.S. is the same with that in the U.K.A．True.B．False.

Americans and Englishmen have difficulties in understanding each other.A．True.B．False.

Air leakage between the shaft and stuffing box packing in a centrifugal pump is prevented