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某市邮电局在其营业厅内贴出通知，通告规定：凡由市邮电局安装电话的用户。一律到本市邮电器材公司购买电话机；用户办理装机手续的同时，必须先交纳购电话机款，否则不予办理装机手续。通知执行了一段时间后，有关部门接到用户举报，对邮电局的这一行为进行了查处。经调查发现，市邮电器材公司系市邮电局的下属企业。 问：
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【简答题】关于免疫球蛋白叙述,错误的是A. 可经木瓜蛋白酶裂解为Fab段与Fc段 B. 可分为V区和C区 C. 分为IgG、IgA.IgM、IgD.IgE五类 D. 所有免疫球蛋白都是抗体 E. 五类Ig在血清中的含量基本相同
【简答题】Invitation etiquette begins with destination overview, which means you need to give a general description of the venue. When writing formal invitation letters and materials, it’s always safest to assu...
【单选题】关于免疫球蛋白的描述错误的是
A.
血清中含量最多的是Ig M，含量最少的是IgA
B.
IgM是分子量最大的免疫球蛋白
C.
在肠道中起保护作用的主要是SIgA
D.
机体的抗感染作用在体液中主要是IgG，在血管中主要是IgM
E.
唯一通过胎盘的Ig是IgG，初生婴儿从母乳中获得SIgA
【单选题】Which of the following consonants is different from the others according to the place of articulation?
A.
[m]
B.
[n]
C.
[p]
D.
[b]
【简答题】Most visitors come to the UK expecting the rain and weather for which the country is famous. However, when summer finally arrives, British people like nothing more than heading for the coast. Here are...
【简答题】A long slope is to be formed in a soil of unit weight 19 kN/m 3 for which the characteristic shear strength parameters are c′ =0 and φ′= 36. A firm stratum lies below the slope. It is to be assumed th...
【简答题】A long slope is to be formed in a soil of unit weight 19 kN/m 3 for which the characteristic shear strength parameters are c′ =0 and φ′= 30°. A firm stratum lies below the slope. It is to be assumed t...
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