Dương Hạnh
Sắt đoàn
5
1
Tìm x,y biết:
A) 2^x - 2^y = 256 và x,y thuộc N*
B) 3x - y/ x + y = 3/4 và xy = 27
III- Read the text and do the exercises
Water pollution is the contamination of bodies of water such as lakes, rivers, oceans,
and groundwater (the water beneath the Earth's surface). It is one of the most
serious
types of pollution.
Water pollution can have many different causes. Factories dump industrial waste into
lakes and rivers. Farms using pesticides to kill insects and herbicides to kill weeds can
also lead to water pollution. These factors cause 'point source' pollutants from storm water and the atmosphere result in 'non-point source pollution.
Water pollution can have dramatic effects. In many poor nations, there are frequent
outbreaks of cholera and other diseases because of people drinking unstreated water.
Human can even die if they drink contaminated water. Polluted water also causes the
death of aquatic animals such as crabs, fish or birds. Other animals eat these dead animals and may also get sick. In addition, herbicides in water can kill aquatic plants and
cause further damage to the environment. So what should we do to reduce water
pollution?
1. Answer T or F
1.Water pollution is one of the most serious types of pollution.
2. Water pollution can't have many different causes.
3.Factories dump industrial waste into oceans.
4. Water pollution can have dramatic effects.
5. Polluted water also causes the death of land animals
6. Polluted water effects health people.
2. Answer the questions.
1. What type of pollution is the most serious pollution? 2.Where does water pollution come from?
3.Can water pollution have dramatic effects? 4.What is the disease outbreak?
5. What can kill aquatic plants?
A.rút khỏi Bắc Kì như năm 1874
B.án binh bất động ,chờ cơ hội mới
C.mở cuộc đàm phán với triều đình
D.đem quân tấn công thẳng vào Thuận An cửa ngõ kinh thành Huế
Nêu khái niệm núi lửa ?
Số đốt tạo nên phần bụng của châu chấu :
A.6 B.8 C.10 D.12
Thất thường của thời tiết ở đới ôn hòa
Nguyên nhân dẫn đến Đại dịch AIDS ở châu phi và ảnh hưởng như thế nào ở châu phi ?
So sánh cuộc kháng chiến lần 2 và lần 3 trong cuộc kháng chiến chống quân xâm lược Mông- Nguyên ( so sánh khác nhau và giống nhau)
Biết y tỉ lệ thuận với x theo hệ số tỉ lệ k = 2. Khi x=-3 thì giá trị của y bằng bao nhiêu ?
A.-6 B.0 C.-9 D.-1
Trong các khẳng định sau khẳng định nào đúng
A.1/3 E N B.1/3 E Q C.1/3 E Z D căn bậc 2 của 1/3 E Q
Trong mặt phẳng tọa độ Oxy cho điểm N nằm trên trục hoành có hoành độ bằng 2 thì tọa độ của N là
A.N (0;2) B.N (2;2) C.N (2;0) D.N (-2;2)
Thực hiện phép tính
15/34 + 7/21 + 19/34 - 20/15 + 3/7
Tìm x,y biết:
7x=3y và x-y=16
1.Tìm x biết:
a)
Past simple tense
1. He ate a lot of fried food so he ____fat quickly
A.get B.got C.gets D.will get
2.we came to the remote villages and____meals for homeless children
A.made B.make C.have made D making
3 i_____and interesting news from my best friend yesterday
A.have heard B.heard C .hear D.did hear
4. Did you___"iron man" on tv last night?
A.watch B.watched C.have watched D.haven't watched
5.they___a community garden project last month
A.start B.started C.has started D.have started
6.going home from school yesterday , i ___an old man to go across the street
A.helped B.help C.have helped D.was helping
7.how many novels ____Charles Dickens____?
A.did/write B.have/written C.did/written D.does/write
8.he_____this poem when he was young.
A.write B.wrote C.has written D.have written
9.peter____to paris for a holiday last week
A.went B.has gone C.goes D.will go
10.we____sick children in Hue hospital last sunday
A.visit B.visited C.have visited D.will visit
11.last tuesday , i ____home late because there _____a traffic jam near my school
A.go/has been B.go/was C.went/ was D.went /has been
12.yesterday ,i_____a book of Nguyen Nhat Anh
A.read B.readed C.has read D.reads
13.she_____small childen in the neighbourhood last month
A.tutor B.tutored C.tutors D.has tutored
II.give the correst form of the verbs in the blanket. Question
14.tom (leave )_____for ***don last night
15.he (win)____the gold medal in 2015
16.she (donate)____her clother to the poor children in her last visit to her hometown.