玻璃体手术中治疗复杂视网膜脱离,硅油填充时眼压控制在________即可。
参考答案:2.7 kPa(21 mmHg)
all of us enjoy eating hamburgers, we can't eat too much of junk food. [ ]
A. As
B. Because
C. Although
在带钢生产过程中,平整机能够(),消除局部厚度偏差。
A、改善板形
B、改善表面质量
C、改善距偏