kidou wo kakuninsite, zinkoukokyuu to kyoukotuappaku wo rensyuusuru.

It is read:

きどう を かくにんして、じんこうこきゅう と きょうこつあっぱく を れんしゅうする。

Word by word:

• 気道 = きどう
• 確認して = かくにんして
• 人工呼吸 = じんこうこきゅう
• 胸骨圧迫 = きょうこつあっぱく
• 練習する = れんしゅうする

That is correct: Japanese normally does not use spaces like this.

The sentence would normally be written as:

気道を確認して、人工呼吸と胸骨圧迫を練習する。

The spaces in your version are just a learning aid to make the parts easier to see.

Because there are two different objects in the sentence.

• 気道を確認して = check the airway
• 人工呼吸と胸骨圧迫を練習する = practice artificial respiration and chest compressions

So the first を marks 気道 as the object of 確認して.

The second を marks 人工呼吸と胸骨圧迫 as the object of 練習する.

Because 人工呼吸と胸骨圧迫 is being treated as one combined noun phrase:

人工呼吸と胸骨圧迫 = artificial respiration and chest compressions

Then that whole phrase becomes the object of 練習する, so only one を is needed at the end.

This is very normal in Japanese.

Here, と means and when joining nouns.

So:

• 人工呼吸と胸骨圧迫 = artificial respiration and chest compressions

This is the standard way to connect two nouns in an exhaustive list, meaning both items are included.

確認して is the て-form of 確認する.

The て-form is often used to connect actions, like:

• do A, and then do B
• A and B

So:

• 気道を確認して、人工呼吸と胸骨圧迫を練習する。

means something like:

• Check the airway, then practice artificial respiration and chest compressions.

Using 確認する there would not connect smoothly to the next action.

Yes, usually it suggests that order.

The natural reading is:

1. check the airway
2. practice artificial respiration and chest compressions

The て-form often gives this kind of and then feeling, especially in instructions or procedures.

Japanese often leaves out the subject when it is obvious from context.

So this sentence could mean things like:

• You check the airway and practice artificial respiration and chest compressions
• We check the airway and practice artificial respiration and chest compressions
• One should check the airway and practice artificial respiration and chest compressions

In English, you usually need a subject. In Japanese, it is often omitted if the situation makes it clear.

練習する is the plain form.

This plain form is often used in:

• manuals
• instructions
• textbook example sentences
• general statements

If you wanted a polite version, you could say:

気道を確認して、人工呼吸と胸骨圧迫を練習します。

Both are grammatically fine; the difference is mainly style and level of politeness.

It can mean both, depending on context.

In this sentence, 確認する is best understood as to check or to make sure of.

So 気道を確認して means something like:

• check the airway
• make sure the airway is clear

This is a very common use of 確認する in practical or instructional contexts.