火麻仁的性味是
A.苦,寒B.咸,苦,寒C.甘,平D.苦,甘,寒,有毒E.辛,苦,温,有毒
参考答案:C
We are living in an age _____ many things are done on computer.
A.which
B.that
C.who
D.when
简要说明多协议标签交换技术提高服务质量的原理。