颗粒剂质量中,要求水分含量在()
A.2%以内
B.3%以内
C.5%以内
D.6%以内
E.9%以内
参考答案:D
If it is left ______, this fast-spreading disease is likely to affect millions of Asian and African children, including more and more injured grown-ups.
A.unchecked
B.uncontrolled
C.transmitted
D.contaminated
碳弧气刨结束时,应先(),并应过几秒钟后才(),以使碳棒()。