针状硬合金钻头
参考答案：
将包孕有针状硬合金的切削块镶嵌在钻头体上的钻头。
_____ he _____ Susan swim very well, for they have been trained since seven years ago. [ ]
A. Either, or
B. Neither, nor
C. Both, and
D. Between, and
内墙装饰涂料选择怎么样的色调、如何合理的搭配颜色呢？
