越成熟的棉纤维,其纺纱性能越好。
参考答案:错
若p:x2>4,q:x>2,则p是q的______条件.
A.充分不必要 B.必要不充分C.充要 D.既不充分也不必要
Few pleasures can equal such of a cool drink on a hot day.
A.this
B.all this
C.that
D.all that