問題詳情
4. 为防止甲型H1N1病毒在人群中的传播，有人建议接种人流感疫苗，接种人流感疫苗能够预防甲型H1N1流感的条件之一是：甲型H1N1病毒和人流感病毒具有相同的
(A)侵染部位
(B)致病机理
(C)抗原决定簇
(D)传播途径
(A)侵染部位
(B)致病机理
(C)抗原决定簇
(D)传播途径
參考答案
答案：C
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)
內容推薦
- The rain was heavy and _____the house was damaged.(A)consequently(B)constantly (C)consistently(D)
- born in Chicago, the writer is the most famous for his stories about New York City.(A)Although (B)
- 下列有关哺乳动物个体发育的叙述，错误的是.(A) 胚胎发育过程中也会出现细胞衰老(B) 幼鹿经过变态发育过程长出发达的鹿角(C) 胚后发育过程中伴有细胞分化(D) 来自原肠胚同一胚层的细胞经分化
- 曲线①～④代表的地物分别可能是(A) 沙地、湖泊、林地、草地 (B) 沙地、草地、林地、湖泊 (C) 草地、沙地、湖泊、林地、 (D)草地、林地、沙地、湖泊
- The colorfrom yellow through green to black.(A)ranges(B)constitutes (C)composes(D)consists
- I appreciate _____to your birthday party.(A)to be invited (B)to have invited (C)having invited (D
- Once a decision is made, it must be firmly(A)carried on (B)carried out(C)carried away (D)carried o
- 人体甲状旁腺分泌甲状旁腺素，当人体血钙浓度下降时，甲状旁腺素分泌增加，作用于骨和肾脏使血钙浓度上升。甲状腺C细胞分泌降钙素，当血钙浓度上升时，降钙素分泌增加，作用于骨等使血钙浓度下降。下列关于血
- 已知：2H2（g）+ O2(g)=2H2O(l) ΔH= -56KJ• mol-1CH4（g）+ 2O2(g)＝CO2(g)＋2H2O(l) ΔH= -890KJ• mol-1现有H2与
- 5．人体受到某种抗原刺激后会产生记忆细胞，当其受到同种抗原的第二次刺激后(A)记忆细胞的细胞周期持续时间变短，机体抗体浓度增加(B)记忆细胞的细胞周期持续时间变长，机体抗体浓度增加(C)记忆细胞的细胞
內容推薦
- When it _____ school work, the professor will treat his students qpually.(A)comes to evaluate(B)c
- 7．实验室现有3种酸碱指示剂，其pH变色范围如下甲基橙：1～4 石蕊：0～0 酚酞：2～0用0.1 000mol/L NaOH 溶液滴定未知浓度的CH3COOH 溶
- 114． 在工程网络计划中，关键工作是指( )的工作。(A) 单代号网络计划中最迟完成时间与最早完成时间相差最小(B) 双代号时标网络计划中工作箭线上无波形线(C) 单代号搭接网络计划中最迟开始时间与
- 下列属于种间竞争实例的是(A) 蚂蚁取食蚜虫分泌的蜜露(B) 以叶为食的菜粉蝶幼虫与蜜蜂在同一株油菜上采食(C) 细菌与其体内的噬菌体均利用培养基中的氨基酸(D) 某培养瓶中生活的两种绿藻，一种
- Without his wise mother ,he ________such a successful scientist.(A)would not become(C)may not have
- _____you will never convince him.(A)However long you argue (B)However you argue long(C)How you ar
- 8．对于ⅣA族元素，下列叙述中不正确的是(A)SiO2和CO2中，Si和O，C和O之间都是共价键(B)C、Si和Ge的最外层电子数都是4，次外层电子数都8(C)CO2和SiO2都是酸性氧化物，在一定条
- 115． 工程网络计划的资源优化是指( )的过程。(A) 在工期保持不变的条件下，使资源强度最小(B) 在满足资源限制条件下，使工程总成本最低(C) 在满足资源限制条件下，使工期延长最少(D) 在工期
- 2．下列关于人体内环境及其稳态的叙述，正确的是(A)葡萄糖以自由扩散方式从消化道腔中进入内环境(B)H2CO3/ NaHCO3 对血浆pH相对稳定有重要作用(C)内环境的温度随气温变化而变化(D)人体
- _____new products have been successfully trial-produced.(A)A great deal(C)A plenty of(B)A large a
- Experiments(A)showthat accurate measurements be made.(B)prove (C)demand (D)head
- He has made a discovery,_____ of great importance to the progress of science and technology.(A)I
- 9．取浓度相同的Na0H和HCl溶液，以3∶2 体积比相混合，所得溶液的pH 等于12，则原溶液的浓度为(A)0.01mol/L (B)0.017mol/L(C)0.05mo
- Smoking is so harmful to personal health that it kills _____ people each year than auto-mobileacc
- What they have done for us can't be measured in _____ of money.(A)way(B)means (C)terms (D)pl
- (A)explore (B)are exploring (C)explored (D)will explore
- Go and get some water,_____?(A)don't you (B)shall you (C)can't you(D)won't you
- (A)put up (B)came up (C)made up (D)set up
- (A)plant (B)situation (C)surroundings (D)circumstance
- You must pack plenty of food for the journey, _____,you'll need warm clothes, so pack them t
- (A)with (B)under (C)for (D)without
- 10．右图为直流电源电解稀Na2SO4 水溶液的装置。通电后在石墨电极a和b附近分别滴加一滴石蕊溶液。下列实验现象中正确的是(A)逸出气体的体积，a电极的小于b电极的(B)一电极逸出无味气体，另一电极
- (A)deeply (B)normally (C)commonly (D)deep
- Meat easily _____ in hot weather.(A)turns badly(B)becomes badly (C)goes bad(D)changes worse
- (A)living (B)situation (C)structure (D)environment