“诗外有诗，方是好诗；词外有词，方是好词，”作者是（）
A.苏东坡
B.王国维
C.梁启超
D.陈廷焯
参考答案：D
不等式x＜1的解集就是0和全体负数的集合。[ ]
To improve the quality of our products, we asked for suggestions _____ had used the products.
A．whoever
B．who
C．whichever
D．Which
