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【单选题】
将抗体固定在层析柱的载体，使抗原从流经此柱的蛋白质样品中分离出来，这技术属于：A.
吸附层析
B.
离子交换层析
C.
凝胶过滤层析
D.
亲和层析
E.
疏水层析
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举一反三
【单选题】When I got to school, Amy ______his homework.
A.
had invented
B.
had finished
C.
had developed
D.
had rushed
【单选题】It was the first time ______ I ______ here.
A.
when; had come
B.
that; have been
C.
when; came
D.
that; had been
【单选题】Now that you are not able to speak English freely，you had better choose simple words and sentences to make yourself understood when you talk with others in English.
A.
你现在不能随便说英语，如果需要用英语和别人谈话的时候，最好还是挑选简单的单词和句子，这样你自己就可以得到别人的理解了。
B.
现在，你还无法随意地说英语，当你用英语和别人交流时，最好还是选择简单的词汇和句子，以便别人能够明白你的话。
C.
既然你现在还不能自由地说英语，所以你在用英语和别人谈话时，最好还是挑选简单的单词和句子，以便使你自己被别人明白。
D.
既然你还无法随意地说英语，在你用英语和别人交谈时，最好还是选择简单的词汇和句子，让别人能听懂。
【简答题】女性34岁，孕3产0，因月经过多，继发贫血就诊。半年来月经周期规则，经期延长，经量多，偶有痛经，白带稍多。查体：子宫均匀增大如孕7周，双附件未见异常。B超发现宫腔内有一实性团块，直径3.5cm。
【简答题】"I went to the Great Wall yesterday," he said. He said that ( 1 ) had gone to the Great Wall the day before. "We have to finish our experiement," they said. They said ( 2 ) had to finish ( ...
【单选题】-Did you see Mr Brown when you were in France? -No, when I France, he had gone to China. [ ]
A.
had arrived to
B.
arrived to
C.
had got to
D.
got to
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