皮皮学，免费搜题
登录
搜题
【单选题】
下列关于药物纯度的说法正确的是( )A.
药物的纯度是指药物中所含杂质及其最高限量的规定
B.
药物的纯度标准主要依据药物的含量而定
C.
药物纯度比试剂用纯度更严
D.
物理常数测定不能表明药物的纯度
E.
以上均不正确
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】_____ by the clear waters, this forest provides visitors with a wonderful chance to see some endangered native birds in the wild.
A.
Being surrounded
B.
Surrounding
C.
Surrounded
D.
To be surrounded
【简答题】Dreamweaver CC工作窗口由哪些组件构成?
【简答题】某企业A材料的全年需求量为360000千克,每千克的进价标准价为24元,供货商规定:如果每次采购90000千克以上180000千克以下的,价格优惠4%;如果每次采购180000千克以上,价格优惠5%。现在每次材料采购费用为1600元,每千克的储存成本为1.28元。则存货的最佳进货批量为多少千克?
【单选题】Reading English novels helps ________ your vocabulary.
A.
enlarge
B.
endange
C.
ensure
D.
entitle
【简答题】A More than two thirds of the world ’ s polar bears will be wiped out by 2050 , according to a shocking new study.By then , scientists say , global warming will have melted 42 percent of the Arctic se...
【单选题】The project will help people understand the many threats to the natural environment ________ endangered plants and animals live.
A.
which
B.
when
C.
where
D.
that
【简答题】LONDON ( Reuters)-- Ecotourism ( 生态旅游) is causing a lot of damage to wildlife and may be enering the survival(生存) of the very animals people are flocking to see, according to researchers. Biologis...
【单选题】Sharks are endangered mainly because ______.
A.
Japanese believe that fish cannot be endangered
B.
we don't have effective measures to protect them
C.
Chinese have a desire for their fins in the cooking
D.
sharks don't reproduce fast
相关题目：