脐血S／D在妊娠晚期的正常值为（） A.>2 B. C. D.>3 E.

关于小儿生长发育，下列哪项是错误的（）

A.生长发育是一个连续的过程但各年龄段生长发育并非等速进行

B.生长发育存在着个体差异

C.神经系统发育较早生殖系统发育较晚

D.皮下脂肪肌肉组织年幼时较发达，淋巴系则先快而回缩

E.生长发育遵循由上到下、由近到远、由粗到细、由简单到复杂的规律

10个月婴儿，单纯母乳喂养，虚胖，中度贫血，头部震颤。处理首先应（）

A.口服叶酸

B.肌注维生素B12

C.口服铁剂

D.输血

E.口服多种维生素

对于化学反应R+2HCl═RCl₂+H₂，下列说法错误的是（　　）

A．该反应是置换反应

B．因生成气体，反应后溶液质量减小

C．R可以是Cu

D．R若是Fe，则反应前后溶液颜色有变化

国家和社会治理需要（）共同发挥作用。

A、法律

B、法制

C、人治

D、道德

Technically a given category of insurance policy is underpriced if, over time, claims against it plus expenses associated with it exceed total income from premiums. But premium income can be invested and will then yield returns of its own. Therefore, an underpriced policy does not represent a net loss in every case.
The argument above is based on which of the following assumptions

A．No insurance policies are deliberately underpriced in order to attract customers to the insurance company offering such policies.

B．A policy that represents a net loss to the insurance company is not an underpriced people in every case.

C．There are policies for which the level of claims per year can be predicted with great accuracy before premiums are set.

D．The income earned by investing premium income is the most important determinant of an insurance company’s profits.

E．(E) The claims against at least some underpriced policies do not require paying out all of the premium income from those policies as soon as it is earned.