溶剂萃取法中萃取原则为()。A、多量少次B、少量多次C、一次足量D、多量多次

题型:单项选择题

问题:

溶剂萃取法中萃取原则为()。

A、多量少次

B、少量多次

C、一次足量

D、多量多次

考点:技术监督质检职业技能考试分子生物专业验证(一级)分子生物专业验证(一级)题库
题型:单项选择题

How much of an addict(成癖/嗜好) are you? Are you like any of the people?

①I dislike haircut. I seldom(很少) get a haircut. So when I get one, my hair is really short. My hair gets really long before my next haircut.    --- Harry

②I hardly drink soda(苏打水).I usually drink coffee. I sometimes drink eight cups a day. ---Rose

③I exercise regularly(有规律地).Sometimes I spend 4 or 5 hours on it in one day.  ---Sam

④I have a bar(条/根) of chocolate sometimes. I can’t eat a lot of it, because it makes me heavy.   ---Kim

⑤I have a TV in my living room, one is in my dining room, one is in my bedroom. I even have one in the bathroom.  --- John

⑥I spend a lot of time shopping, but I don’t spend a great deal of (大的量)money. I mostly  do window shopping.     ---Jenny

小题1:How often does Harry get a haircut?

A.Once a month

B.Twice a year

C.hardly ever

D.Always小题2:How many TVs does John have?

A.Four

B.Three

C.Two

D.Five小题3:How much time does Sam spend on exercise?

A.Four or five hours in a day.

B.Five hours in one day.

C.Four hours in one day.

D.One day.小题4:Kim has chocolate _________ ,while Jenny spends ________ shopping.

A.once, a lot of time

B.sometimes, a great deal of money

C.sometimes, a lot of time

D.once, a great deal of money

题型:单项选择题

短期借款账户应该按照( )设置明细账。

A.借款种类
B.债权人
C.借款的性质
D.借款的时间

题型:单项选择题

对于不明原因发热病例,应注意询问()。

A.发病前14天内的旅行史或可疑的暴露史

B.了解本人或其密切接触的类似病人近期有无赴沙特、阿联酋、卡塔尔、约旦等中东国家以及韩国等其他近期有中东呼吸综合征病例国家的旅行史

C.可疑动物(如单峰骆驼)的接触史

D.类似病例的接触史

E.以上都不对

题型:单项选择题

简述近代中等教育发展变化的主要表现。

题型:单项选择题

针对杜会广泛关注的国有垄断金融机构收入中“高管干一天,柜员干三月”“薪酬标高,旱涝保收”等现象,有专家指出,“高管”的薪酬要与市场水平看齐、与业绩关联。这一观点()

①既有利于提高效率,也体现了分配公平

②强调了效率是公平的物质前提

③符合我国社会主义初级阶段的分配原则

④是按资分配方式在新时期的发展与完善

A.①②

B.①③

C.②③

D.③④

更多题库