按照替代物的不同,可分为直接替代,如利用志愿者或人类的组织等;间接替代如利用()替代实验兔热原试验等。
A.格氏试剂
B.鲎试剂
C.机器
D.细胞实验
参考答案:B
急性感染性喉炎患儿烦躁不安时最好选用()。
A.异丙嗪
B.氯丙嗪
C.地西泮
D.鲁米那(苯巴比妥)
E.水合氯醛
Specific duties are levied()some physical unit such as dollars per bushel, per kilo, or per metre and ad valorem duties are calculated as a percent of the value of the goods.
A. on the basis of
B. with the basis of
C. on the base of
D. with the base of