A:注射剂若为抗原Y,则抗体变化曲线为D
B:曲线A与C的抗体类型相同
C:曲线B表明:注射后,免疫反应快,作用强
D:曲线A表明:兔体内不能产生与抗原X有关的记忆细胞。
我国主要的工业基地有辽中南工业基地、____工业基地、____工业基地和珠江三角洲工业基地。
A.小灯泡L( 3V、5Ω);
B.滑动变阻器R(0﹣10Ω,额定电流1.5A);
C.电压表V1(量程:0﹣3V,RV=5kΩ);
D.电压表V2(量程:0﹣15V,RV=10kΩ);
E.电流表A1(量程:0﹣0.6A,RA=0.5Ω);
F.电流表A2(量程:0﹣3A,RA=0.1Ω);
G.铅蓄电池、开关各一个,导线若干;
实验中要求加在小灯泡两端的电压可连续地从零调到额定电压.
挖窑洞居住,以小米为主食的居民分布在下列哪个地区
Hello! I'm Dolly. ①I work at a hospital. ②I'm a nurse. My house is not far from the hospital. ③So I walk to work.④And my brother is a teacher.⑤He goes to work by car.
①____ ②____ ③____
④____ ⑤____
A. How does he go to work?
B. Where do you work?
C. What does your brother do?
D. How do you go to work?
E. What do you do?