【单选题】依地酸二钠钙(CaNa 2 EDTA)()
A.
是最常见的氨羧螯合剂,可与多种金属形成稳定可溶的金属螯合物排出体外
B.
化学结构、作用与依地酸相似,但促排铅的效果比依地酸好
C.
为含有活性巯基(-SH)化合物,药物进入体内后可与某些金属形成无毒的、难解离的螯合物由尿排出
E.
主要用于治疗锑、铅、汞、砷、铜等中毒。近来发现用该药口服治疗铅中毒有效
【单选题】测定灰分取样时,应以灼烧后得到的灰分量为 来决定取样量
【单选题】What is Pre-Cana?
A.
It is used to reduce the divorce rate of all couples.
B.
It is a form of premarital counseling for Catholics.
C.
It is a course for all couples undergoing before marriage.
D.
It is the only reason that Catholics have the lowest divorce rate.
【简答题】传动系统有哪些总成组成?叉车传动系统有哪些传动方式?
【简答题】水玻璃的化学组成是什么?水玻璃的模数、密度(浓度)对水玻璃的性能有什么影响?
【单选题】According to the author, the safety net can
B.
relieve the pressure that comes with old age.
C.
lead to a shrinking workforce.
D.
have some negative effects on the economy.
【简答题】What is the first sign that Jesus reveals in Cana of Galilee?
【判断题】d t和 zh chi shi的发音部位比较接近。