.


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, .

in, on (upon) : in , , ; on (upon) , , . by , ; through , -. . in, on (upon) by .


. without 1.

1. In solving problems it is necessary to distinguish between
fact and hypothesis.

. , ... , ...

2. The data on the behaviour of NiO were verified by
analyzing experimental curves

NiO

.

...

. . , 1- , 2- :

1. Johns had some difficulties in evaluating the weight of...
...
...

2. Joule had difficulty in persuading British scientists in thetruth of

caloric theory.

.

, in, on (upon), by, without:

1. A metal in reacting is often oxidized.

2. In making observations extreme care to avoid errors
is necessary.

3. The expansive force of water in freezing is enormous.

4. On standing for some weeks the uranium solution
gradually regains its initial activity.

after , before , for , , ().


 

5. Upon being heated to a high temperature many metallic
compounds are decomposed.

6. Phosphine is prepared by heating white phosphorus in
a concentrated solution of sodium hydroxide.

7. Sulphur is hardened by being mixed with copper.

8. Phosphorus burns in chlorine without being lighted and
gives rise to a compound called phosphorus chloride.

9. Most precipitates may be ignited without drying if
proper precautions are not taken.

10. Metals cannot be dissolved without being changed
into new substances.

, , of for probability , ability . :

There is little probability of atmosphere being on that planet.

, .

, :

ability

advantage

chance

merit

necessity

possibility

reason ,

way


, , :

1. The device has the merit of being suitable for many
purposes.

2. There is no necessity of making any corrections.

3. Out purpose is to calculate the chance of the electron
passing over the destance x.

4. The independent particle model has the advantage of
possessing a high degree of physical visuality.

5. The observed intensity of the radiation thus emitted
depends on the probability of there being an electron in the
upper level of the transition.

6. There is some reason for questioning this assumption.

7. He had early opportunity of becoming well acquainted
with experimental work.

8. We have no way of selecting particular ensimes that
are likely to reveal effects of gene dosage.

. , , . : , , , . () . , () . , . , .


1. Dr. Brown's being absent was very strange.
- .

, - , .

2. This depends on the atomic weights of these substances
being equal.

, (. .: ).

. , ( ) , . , :

insisted on being examined by a physician.

, .

. , , . , . , .

. . , , , . . , . :

1. These substances are alike in having high melting points.
,
.

2. In spite of not having any university education, Faraday
made his great discoveries.

, , .

, ...


, :

on account of -

apart from } ,
aside from }

in addition to ,

besides

because of -; ;

despite

due to ;

except (except for) ,

instead of

in spite of
owing to }

thanks to }

with the object to }

with the view to }

save

. , , , . : , , , . :

1. The molecules of a polar substance because of their
being reactive combine with one another.

2. Combustion may be incomplete owing to insufficient
oxygen being present.

3. Thomson investigated the possibility of these cathode
rays being charged particles.

4. Mme Curie's having discovered radium enabled her to
isolate other radioactive elements.

5. The inability of phosphorus atoms, because of their
large radius, to establish triple bonds among themselves


results in the phosphorus molecule having a very different structure from the nitrogen molecule.

. , , . . , , , . , , , , :

6. Besides being important for industry oxygen is also
important for medicine.

7. In addition to depending upon the acceleration, force
also depends upon the mass of the object.

8. Gamma-rays are not affected by magnetic or electric
fields and are identical with X-rays, except in being more
penetrating, thus being in fact ordinary light pulses of the
shortest wavelength.

9. Oxygen is an active element of the atmosphere, and
in addition to being essential for the maintenance of life it
is also essential for combustion, the rusting of metals and
the decay of organic matter.

10. Aside from being one of the few known thirdorder
gas reactions the reaction of NO and O2 is also one whose
rate decreases with increase in temperature.





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