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В чем заключается принципиальное отличие вакцины от сыворотки
Ответы 1
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Или можно сказать так: вакцину вводят только здоровому человеку, чтобы имитировать заболевание. Больным вводить ещё ни в коем случае нельзя. А сыворотку вводят, когда человек уже заболел, чтобы помочь организму справиться с вирусом.
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Автор:
kittyqjpu - 5 лет назад
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Упражнение 180
Раскройте скобки, употребляя глаголы в Present Continuous или в Present Simple.
1.
I (to take) my sister to school now.
I (to take) her to school every day.
2.
He (to help) his father now.
He (to help) his father very often.
3.
At the moment they (to go) to the river for a swim.
They usually (to go) to the river for a swim.
4.
She (to play) the violin now.
She (to play) the violin every day.
5.
I (to read) now.
I (to read) every day.
6.
He (to sleep) now.
He (to sleep) every night.
7.
We (to drink) tea now.
We (to drink) tea every morning.
8.
They (to go) to school now.
They (to go) to school every morning.
9.
I (not to sleep) now.
I (not to sleep) in the day time.
10.
She (not to drink) coffee now.
She (not to drink) coffee after lunch.
11.
We (not to watch) TV now.
We (not to watch) TV in the morning.
12.
They (not to eat) now.
They (not to eat) at the lesson.
13.
My mother (not to work) now.
My mother (not to work) at an office.
14.
You (to work) now?
You (to work) every day?
15.
He (to play) now?
He (to play) in the afternoon?
16.
They (to eat) now?
They (to eat) at school?
17.
Your sister (to rest) now?
Your sister (to rest) after school?
18.
What you (to do) now?
What you (to do) every morning?
19.
What you (to read) now?
What you (to read) after dinner?
20.
What they (to eat) now?
What they (to eat) for breakfast?
21.
What your brother (to drink) now?
What your brother (to drink) in the evening?
22.
Everybody (to have) a good time now?
Everybody (to have) a good time every Saturday?
23.
She (to take) medicine now?
How often she (to take) medicine?
24.
Where they (to go) now?
Where they (to go) on Sunday?
25.
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What languages they usually (to speak)-
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