皮皮学，免费搜题
登录
搜题
【多选题】
利用紫外可见分光光度法鉴别的方法是A.
比较最大吸收波长下的百分吸收系数
B.
对比吸收光谱图
C.
比较固定波长下的吸光度或吸光度比值
D.
比较最大吸收波长、最小吸收波长
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【单选题】Children are advised to _________ their food carefully in their childhood. .
A.
chew
B.
digest
C.
swallow
【单选题】Parents are advised to put books __________ they are easily accessible to children .
A.
which
B.
where
C.
in which
D.
who
【简答题】In America, most people don’t get enough sleep. Children aged 5 to 12 are advised to sleep 10 to 11 hours every night, but most of them can’t sleep that long. A study found that about 41 million Ameri...
【单选题】If children have flulike symptoms, their parents ______.
A.
are advised not to give them aspirin
B.
should watch out for signs of Reye syndrome
C.
are encouraged to take them to hospital for vaccination
D.
should prevent them from mixing with people running a fever
相关题目：
参考解析：
知识点：
题目纠错 0
发布
