When keeping a laboratory notebook, a student should 1. always start every experiment where one left off and put the date and title in the margin.2. mark out any unused portion of the page to indicate the conclusion of the day's work if there is no additional work to be done with the experiment. 3. start every experiment on a new page with a date and title at the top. 4. avoid including any changes to the experimental procedure that may have been necessary and the reasons for the change.

2. mark out any unused portion of the page to indicate the conclusion of the day's work if there is no additional work to be done with the experiment.

3. start every experiment on a new page with a date and title at the top.                                            

Explanation:

A laboratory notebook is a mainly used as a working document in a research  work or an experiment. It is the first place where we record all the work, including the hypotheses, the experimental setup, calculations, data  and the early analysis.

In order to make a lab copy to start a new experiment, we should always start a new experiment in afresh page giving the date and the title of the experiment at the top. Also at the end of the experiment, we should mark the unused portion of the page in order to show the result of the day's experiments when there is no other additional work to be done.

the secretary of state, appointed by the president with the advice and consent of the senate, is the president's chief foreign affairs adviser. the secretary carries out the president's foreign policies through the state department and the foreign service of the united states.

there are no options provided but you can choose among the following gender-neutral pronouns: zir, hir, eir, vis, tem, eir.

in the normal course of maintaining a pronoun-antecedent agreement, we could have used the words his or her but since we are also required to use gender-neutral language, we need to replace it with its equivalent gender-neutral pronoun.