刀尖的圆弧半径和后刀面磨损量增大，将使冷作硬化层深度增大
参考答案：对
Having a trip abroad is certainly good for the old couple, but it remains ______ whether they will enjoy it.[ ]
A. to see
B. to be seen
C. seeing
D. seen
代谢性酸中毒，易出现（）
A.呼吸浅快
B.口唇呈樱红色
C.发生手足搐搦
D.精神萎靡、烦躁或嗜睡
E.细胞内液钾降低，细胞外液钾增高
