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【单选题】
反相键合相色谱是指（）A.
固定极性，流动非极性
B.
固定相的极性远小于流动相的极性
C.
被键合的载体为极性，键合的官能团的极性小于载体极性
D.
被键合的载体为非极性，键合的官能团的极性大于载体极性
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举一反三
【简答题】简述土壤氧化还原性对土壤的影响。
【单选题】--- That T-shirt with Yao Ming’s picture on it ________ belong to David. He admires him a lot. ---No, it ________ be his. He hates black color.
A.
can; can’t
B.
may; needn’t
C.
must; mustn’t
D.
must, can’t
【简答题】小题1:Tom was d ______ to learn that he had passed the important lest． 小题2:Whether we will go for an outing or not tomorrow d ______ on the weather． 小题3:Mike tried again and again and e _____ he made it...
【单选题】A Fire near Waco Six years later, in an about-face, the Federal Bureau of Investigation(FBI) admits that federal agents fired tear gas canisters capable of causing a fire at the Branch Davidian compou...
A.
the canisters were fired at the main structure
B.
the canisters were fired hours before the fire started
C.
federal agents fired tear gas canisters capable of causing a fire
D.
other tear gas canisters that were not flammable or potentially explosive were also used
【简答题】简述氧化还原电位对土壤养分有效性的影响。
【单选题】患者女性, 7O 岁,患有风湿性心脏病二尖瓣狭窄、慢性心力衰竭,进行强心、利尿、扩血管治疗,在使用洋地黄药物时,要注意患者有无禁忌证。下列属于应用洋地黄类药物禁忌证的疾病是
A.
充血性心力衰竭
B.
三度房室传导阻滞
C.
心房颤动
D.
室上性心动过速
E.
心房扑动
【单选题】下列有关旅游的特点的叙述,正确的是
A.
旅游的广泛性就是指旅游地域的广阔性和活动领域的多面性
B.
旅游的参与性是指旅游活动在旅游全过程中必须亲临其境，身体力行的不可替代性
C.
旅游的综合性是指旅游活动内容的丰富性及其所属性质的多样性
D.
旅游的差异性是指旅游活动因仅受自然条件的制约而呈现出淡季和旺季的差异性
【简答题】动词填空 1. -Have you seen the movie Transformers III recently? -Yes. I __________(see) it not long ago. 2. Amy seems to be imaginative enough __________(come) up with such wonderful new ideas. 3. A sente...
【单选题】Part A Directions: Read the following three texts. Answer the questions on each text by choosing A, B, C or D. Mark your answers on ANSWER SHEET 1. David Beckham is the king of the football world, but...
A.
Beckham listens to his wife
B.
Victoria listens to her husband
C.
Beckham and Victoria discuss and do everything together
D.
Beckham has no mind of his own
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