搜题请搜索小程序“爱下问搜题”
问题 单项选择题 A1/A2型题

制备乳膏剂时，O/W型乳化剂中常需加入（）

A.润滑剂

B.抗氧剂

C.助悬剂

D.填充剂

E.防腐剂

答案

参考答案：E

解析：O/W型基质外相含多量水，在储存中可能霉变，常加入防腐剂。所以答案为E。

单项选择题

急性胰腺炎病情变化重要指标（）

A.血清淀粉酶>500U

B.血清钙<1.87mmol/L

C.白细胞>12×109/L

D.血糖8.0mmol/L，尿糖（+）

E.PaO2下降，<60mmHg
查看答案
单项选择题

astute service providers realize that the continued support of legacy X.25 and asynchronous network element using separate operations network is cost (141) . For example, the maintenance of multiple networks can require additional staff. Often, this staff must be trained on multiple vendor technologies, sometimes requiring parallel groups specializing in each (142) . Hence, additional maintenance procedures must be maintained and administrative records are (143) . The duplication of transport facilities to carry (144) network traffic is an inefficient use of resources. And not surprisingly, more technologies installed in a central office means the necessity for more physical space and an increase in power connections and power consumption, migration of these (145) network elements to IP-based DCns is alogical strategy.

（143）是（）

A.declined

B.proliferated

C.destroyed

D.produced
查看答案