皮皮学，免费搜题
登录
搜题
【单选题】
关于化学试剂和纯水的使用,下列描述不正确的是A.
按不同实验对试剂纯度的要求，分别选用不同纯度规格的试剂。
B.
按不同实验对纯水的要求，分别选用不同规格的 纯水 。
C.
称量时多取出的化学试剂放回原瓶，避免造成 不必要的浪费 。
D.
超越纯度级别使用 化学试剂和纯水，会造成不必要的浪费。
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】When will the passengers be able to get up again? [A] When an air-hostess says so. [B] When the seat-belt warning sign goes off. [C] When the captain makes another announcement.
【单选题】Where will the passengers change trains to go to Gilford?
A.
East Croydon.
B.
Victoria.
C.
Southeast.
D.
Red Hill.
【简答题】A. The following short dialogues contain expressions used in dealing with freight forwarders. Listen and fill in the blanks with the expressions you hear. Dialogue 3 : Mr. Smith, can we have a b...
【多选题】When will the passengers get their private bill on board?
A.
On the last night on board
B.
On the first night on board
C.
In the early morning of the disembarkation
D.
On the second day on board
【多选题】What information will the passengers get before they disembark?
A.
The show time
B.
The place where they gather together
C.
Their departure time
D.
Their disembarkation group
相关题目：
参考解析：
知识点：
题目纠错 0
发布
