题目

下图为双抗体夹心法是医学上常用的定量检测抗原的方法，利用细胞工程技术制备的单克隆抗体能增强该过程的有效性，下列相关叙述正确的是A.将相关抗原注射到小鼠体内，可从小鼠脾脏中获得所需的单克隆抗体B.固相抗体和酶标抗体均能与抗原结合，这是由于两者结构相同C.加入酶标抗体的目的是通过测定酶反应产物量来判断待测抗原量D.该方法与只使用单克隆抗体相比，能增加识别抗原的种类 Nowadays a new lifestyle 1 low carbon life(低碳生活)is spreading every corner of our country.The meanings of low carbon are low energy and 2 waste.It is 3 an important project that I can’t wait to express my ideas about it more clearly. In the first place,we should have a no-car day every week in our school.Because cars not only cause serious air pollution 4 also waste energy.On no-car day,neither students nor teachers are allowed to drive to school.Meanwhile,justwalk,jump,cycle or run.Use our legs and 5 the fun. In the 6 place,we had better not use plastic bags any more.No one can bear the “white pollution”. 7 it is wise to use bags which can be reused again and again. Finally,one thing that we should keep in mind：every big thing comes from the subtle.Therefore,as students,we 8 turn off the lights the moment we leave, 9 the water tap in time,and reuse our textbooks and so on. In one word,it is 10 for all of us to put the low carbon lifestyle into our daily life.Just remember these：no-car day,no plastic bags,and no waste.Let’s do it now. ( ) 1.A.said B.called C.spoken D.heard ( ) 2.A.not B.don’t C.no D.doesn’t ( ) 3.A.such B.so C.too D.very ( ) 4.A.and B.or C.but D.if ( ) 5.A.permit B.allow C.enjoy D.think ( ) 6.A.first B.second C.third D.fourth ( ) 7.A.So B.Because C.Though D.But ( ) 8.A.should B.ought C.might D.could ( ) 9.A.turn down B.turn off C.turn up D.turn on ( )10.A.necessary B.importance C.interesting D.relaxing