logo - 刷刷题
下载APP
【单选题】

Which ofthe followingisan important source of retinoic acid for this regulation?

A.
Zinc
B.
Vitamin A
C.
Vitamin D
D.
Iron
举报
参考答案：
参考解析：
.
刷刷题刷刷变学霸
举一反三

【单选题】What is NOT a method of secondary data collection?
A.
In-crisis information
B.
Pre-disaster information
C.
Interviews with key persons
D.
Lessons learnt
查看完整题目与答案

【判断题】Bioactive food components are nonessential biomolecules that are present in foods and exhibit the capacity to modulate one or more metabolic process.（）
A.
正确
B.
错误
查看完整题目与答案

【单选题】已 知 某 温 度 下，A + B → C + D △rHmӨ(1) = -40.0 kJ·mol-1， 2C + 2D → E △rHmӨ(2) = 60.0 kJ·mol-1，则E → 2A + 2B 的△rHmӨ为（ ）。
A.
140 kJ·mol-1
B.
-140 kJ·mol-1
C.
20 kJ·mol-1
D.
-20 kJ·mol-1
查看完整题目与答案

【判断题】因为主题词能反映同一概念主题,适用于查找跨学科或跨专业的文献。
A.
正确
B.
错误
查看完整题目与答案

【单选题】What is NOT a principle for secondary data collection?
A.
Collect all the data you can
B.
Know your information gaps
C.
Be cautious with figures
D.
Know what you are looking for
查看完整题目与答案

【判断题】Generally phytochemicals have been classified into five major categories based on their chemical structures. These categories include carbohydrates、lipids、phenolics、terpenoids and alkaloids.（）
A.
正确
B.
错误
查看完整题目与答案

【判断题】Nutrition experts suggest that young people in our country should eat more milk, eggs, fish, meat and other protein-rich foods, because protein is the main energy source.
A.
正确
B.
错误
查看完整题目与答案

【判断题】慢性肝脏病存在持续细胞损伤,衰老细胞也会不断产生,同时免疫系统钝化,不能清除这些衰老细胞,导致“慢性衰老”的出现,此状况对器官功能有害且利于肿瘤发生。()
A.
正确
B.
错误
查看完整题目与答案

【单选题】What is NOT an aim of Community-Based Surveillance?
A.
Saving lives through early warning that leads to early action
B.
Connects the community to health facility in routine activities
C.
Promote trust within the communities – linking the community to volunteers who are active, available and accessible
D.
Replacing the already existing surveillance systems
查看完整题目与答案

【判断题】可 根 据 化 学 反 应 的 计 量 方 程 式 推 断 反 应 速 率 系 数 的 单 位 和 反 应 总 级 数。 对 反 应2A (g) + B (g)→C (g)， k 的 单 位 是 mol-2·L2·s-1， 反 应 级 数 为 3。 ( )
A.
正确
B.
错误
查看完整题目与答案