在加氢裂化催化剂换油过程中,直到已换进()的新鲜原料油后,方可在2小时后逐步停止注氨和注硫化剂。
A、25%
B、50%
C、75%
D、100%
参考答案:C
用所给词的适当形式填空。
1. If you don't work hard, you can't be a computer _____ (program).
2. I think it's a good idea to go _____ (swim) in the rivers and lakes in summer.
3. I want to work for _____ (me) when I am rich enough.
4. The kids _____ (not) go to school now if it is raining too hard tomorrow.
5. She had _____ (little) money to spend this time, because her father lost his job two weeks ago.
医学伦理学尊重原则应除外的内容是()
A.公平分配卫生资源
B.尊重病人及家属的自主性或决定
C.尊重病人的知情同意权
D.保守病人的秘密
E.保护病人的隐私