How to explain the formation and meaning of the following compounds？ 如何解释所给复合词

The author of this passage probably intended to explain ,______.

A．exactly how radar works

B．why the British used radio waves in their device

C．how radar(word and device)came to be

D．how radar helped the British win the Battle of Britain

Explain, using equations, how the addition of Ca(OH)₂aids in the removal of calcium ions from temporary hard water. What effect would the addition of too much of the reagent have on the desired process？

xes. [B] introduce the topic of IQdifferences between siblings. [C] illustrate the point that previousidentities can be remade. [D] explain how to sharpen one'spsychological skills.

to explain how objectives are formed, history records changes in human objectives, and sociology interprets human behavior. in social contexts.

实际经济周期理论如何解释就业的波动？

How does real business cycle theory explain fluctuations in employment？

How to explain the number of job postings exceeds the number of new IT jobs created？

A.It is because of labor turnover.

B.It is because of economy booming.

C.It is because of government policy.

D.It is because of globalization.

in how the properties ofpolymers are improved by using this approach.

B．alcohol is similar to medicine C．alcohol is a chemical D．alcohol is used to relieve stress

The writer's purpose when writing this passage is______.

A. to describe how pruning a tree is done

B. to discuss different ways of pruning trees

C. to give practical instructions for pruning a tree

D. to explain how a tree wound gets diseased and heals

Why does the author mention the visible-light microscope in the first paragraph？

A．To begin a discussion, of sixteenth-century discoveries.

B．To put the X-ray microscope in a historical perspective.

C．To show how limited its uses are.

D．To explain how it functioned.