【单选题】Which of the following is a beneficial activity of microorganisms?
A.
Some microorganisms are used as food for humans.
B.
Some microorganisms use carbon dioxide.
C.
Some microorganisms provide nitrogen for plant growth.
D.
d.Some microorganisms are used in sewage treatment processes.
【单选题】—Do you think I could borrow your dictionary? —______.
【判断题】在外汇市场上,如果投机者预测日元将会贬值,美元将会升值,便会进行卖出美元买进日元的即期外汇交易。( )
【简答题】An is a substance produced by microorganisms that inhibits or kills other microorganisms
【单选题】“两手攀足固肾腰”该式动作两手向下摩运时应该( )
【单选题】— Alice told me you called yesterday. — Yes, I had a problem with Jane, ___________I thought you could help me with, but you were not in.
【判断题】( )文明旅游规范只要掌握了专业知识和业务技能就可以了。
【单选题】- Mum, I failed to catch the train. - If you __________ at the station ten minutes earlier, you could have caught it.
【单选题】Which of the following descriptions about the relationship between microorganisms and human is WRONG?
A.
all microorganisms cause diseases in human
B.
only a few microorganisms are always pathogenic
C.
many microorganisms are potentially pathogenic
D.
most microorganisms are never pathogenic