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Скільки гасу треба спалити, щоб повністю випарувати 1 л води, що має початкову температуру 20 градусів Цельсія?
Ответы 1
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Q1=Q2Q1=rвmв+свmвtQ2=qкmкrвmв+свmвt=qкmкmк=rвmв+свmвt/qкmк=57 г
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Автор:
abel71 - 6 лет назад
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Выберите правильный вариант.
1) I ___________ you were ill.
a) not knew b) didn’t knew c) didn’t know d) not did know
2) He always ____________ quiet if he ________ the answer.
a) stays, doesn’t know b) stay, don’t know c) stay, doesn’t know d) stays, doesn’t knows
3) He ________ asleep because the film _______ boring.
a) falled, was b) fell, was c) fell, were d) falled, been
4) The concert __________ before we _________.
a) ended, came b) ended, had come c) had ended, had come d) had ended, came
5) The table ________ by my guests.
a) were laid b) was laid c) was layed d) been laid
6) The texts __________ by the teacher.
a) were corrected b) was corrected c) was been corrected d) been corrected
7) I didn’t _______ you to suffer so much.
a) make b) let c) expect d) have
8) They don’t _______ us walk late at night.
a) let b) allow c) forbid d) permit
9) If they ______ your parents, they would punish you more often.
a) are b) will be c) had been d) were
10) She ___________ if you offered.
a) will agree b) would agree c) agreed d) would have agreed
11) I wondered why ______________.
a) was she smiling b) is she smiling c) she was smiling d) she is smiling
12) He said that he _______________never there before.
a) was b) had been c) has been d) didn’t be
13) What ___________ from 4 till 6 yesterday?
a) you were doing b) did you do c) you did d) were you doing
14) I __________ toys when I ________ a child.
a) not had, was b) didn’t have, was c) didn’t had, was d) didn’t have, been
15) This tool is _____________ of a single piece.
a) do b) make c) done d) made
16) Mike, can you ___________ me a favour?
a) do b) make c) does d) makes
17) He ____________ that he couldn’t help us.
a) begged b) admitted c) commanded d) ordered
18) They ____________ me where I was going.
a) warned b) persuaded c) asked d) said
19) Oh! What a nice dress! Thanks a lot! – __________________________!
a) Bless you b) Cheers c) Good afternoon d) You are welcome
20) I’ve got A in Maths! – ___________________!
a) Well done b) You are well c) You are good d) Done
21) Water turns to ice if the temperature is _______ zero.
a) above b) in front of c) below d) behind
22) A natural underground chamber in a hillside or cliff is called a _______________.
a) mountain b) wood c) stream d) cave
23) ____________________ can kill people.
a) rain b) rainbow c) lightning d) snow
24) We shouldn’t _____________ trees.
a) cut down b) make up c) take after d) look alike
25) Television, radio, newspapers, magazines are the ways of _______________.
a) pop culture b) treats of character c) the mass media d) public transport
26) If you don’t hear something on TV, you ______________.
a) switch it off b) turn it up c) plug it in d) do without it
27) You read ______________ in newspapers and magazines.
a) books b) prescriptions c) scores d) articles
28) You need a ____________ to click on icons.
a) mouse b) fox c) can d) rat
29) A painter can be also called a(n)_______________.
a) plumber b) doctor c) artist d) lawyer
30) I don’t remember the _________ of the book but I remember its author.
a) numbers b) chapter c) title d) letters-
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ОЧЕНЬ СРОЧНО ПОМОГИТЕ!-
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