皮皮学，免费搜题
登录
搜题
【单选题】
欲配制pH=9.0的缓冲溶液，最好选用下列缓冲系中的A.
邻苯二甲酸(pKa1=2.89
B.
pKa2=5.51)
C.
甲胺盐酸盐(pKa=10.63)
D.
氨水(pKb=4.75)
E.
硼酸(pKa=9.27)
F.
HAc-NaAc(pKa=4.75)
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
【简答题】What are the proper gifts you should bring if inviting for dinner?
【单选题】What ________ when I saw you yesterday?
A.
did you do
B.
were you doing
C.
you were doing
D.
you did
【简答题】简述存储器的寻址原理是什么?说明地址译码器、控制逻辑电路和双向三态缓冲器的作用分别是什么?
【多选题】申请药品生产的3批药品上市销售的条件是
A.
检验合格
B.
在有效期内
C.
取得批准文号后
D.
必须达到规定的数量
E.
在具有GMP证书、药品生产许可证的企业生产
【简答题】What is a suitable gift that you should bring to a hostess if are going to stay overnight or for a weekend?
【简答题】Answer the following questions: 1) What are the proper gifts you should bring if inviting for dinner? 2) What do people do in Canada after dining in a restaurant as a thankful gesture to the service?
【单选题】If you are invited to dinner in France, you should bring a bouquet for the hostess.
A.
True
B.
False
相关题目：
参考解析：
知识点：
题目纠错 0
发布
