... sống thu được là bao nhiêu?
Cách giải: 1 tấn hay 1000 kg CaCO3 > mCaO = ?, mCaO = ? khi H = 90%
CaCO3 > CO2 + CaO
Cứ 100 g CaCO3 thu được 56 g CaO và thực tế thu được 90%.56 g CaO
hay 100 ... ứng trong các cặp chất nói trên và viết được:
HCl + NaOH >
HCl + MgCO3 >
HCl + K 2CO3 >
NaOH + Cu(NO3)2 >
K 2CO3 + Cu(NO3)2 >
+ Tiếp tục hoàn thành các PTPU trên.
Làm như trên...
...
+) Theo Ox:
)1()cos(
cos
0
0
0
tvx
constvv
a
Ox
x
α
α
=
==
=
+) Theo Oy:
)2.()sin(
2
1
sin
0
2
0
tvgty
vv
constga
Oy
Y
α
α
+−=
=
=
−
=
b)Quỹ đạo:
(1)
α
cos
0
v
x
t =⇔
Định ... đường đó.
t
s
v
tconsv
=
′
=
r
r
-
Biểu thức: trong đó s: quãng đường. t: thời gian
Trong đời sống gọi độ lớn của vận tốc là tốc độ.
Đơn vị : m/s, km/h, cm/s.
3)
Gia tốc:
v = const nên a = ....
... Sundays.
Newspaper adds ins: Will feature a three-page advertisement complete with colorful illustrations
and discount coupons. Will be inserted into the middle of all majors newspapers in ... special on the company
B. The company is breaking into a new market
C. An article about the company has been printed in the local paper
D. The subway and bus stakes will affect the company
Que...
... additional
8. A. courage
B. encouragement C. courageously D. encouraging
9. A. complete
B. completed C. completing D. completive
10. A. compares B. comparing
C. comparisons D. comparisons
... A. come B. am coming
C. was coming D. have been coming
3.
A. had changed B. had been changed
C. have changed D. have been changed
4. A. collected
B. collecting C. having collected D. colle...
... other metal as
conductorsof heat and electricity.
B. Aluminum is a better conductor of heat and electricity than silver, copper and gold.
C. Silver, copper, and gold are better conductors of ... about the strike, he declined to comment.
A. On he was asked about the strike, the Minister declined to comment.
B. On being asked about the strike by the Minister, he declined to comment.
C. .....
... be given to these people to continue their studies.
A. courage B. encourage C. encouraging
D. encouragement
128. It is essential that the Professor …. warmly welcomed at the airport.
A. is ... …. what she could do about the dripping tap immediately.
A. find B. try
C. see D. look
146. He … very quickly after a long illness.
A. covered B. uncovered C. discovered
D. recovered
147. .....
... light as perceptions of color.
A
B C D
37. It is
possible to have wealth but little income and having income but no wealth.
A B
C D
38. When a criminal case goes to trial
, the defendant ... had been converted towards Lenin’s room.
A B C
D
96. In a few seconds
a computer can solve problems that might take a man years to solve solo.
A B C
D
97. In the beginning
radios cost...
...
+) Theo Ox:
)1()cos(
cos
0
0
0
tvx
constvv
a
Ox
x
α
α
=
==
=
+) Theo Oy:
)2.()sin(
2
1
sin
0
2
0
tvgty
vv
constga
Oy
Y
α
α
+−=
=
=
−
=
b)Quỹ đạo:
(1)
α
cos
0
v
x
t =⇔
Định ... đường đó.
t
s
v
tconsv
=
′
=
r
r
-
Biểu thức: trong đó s: quãng đường. t: thời gian
Trong đời sống gọi độ lớn của vận tốc là tốc độ.
Đơn vị : m/s, km/h, cm/s.
3)
Gia tốc:
v = const nên a = ....