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Hai nguồn kết hợp A,B dao động cùng pha với tần số là 50Hz, nằm cách nhau 6cm trên mặt nước. Người ta quan sát thấy các giao điểm của các gợn lồi với đường thẳng AB chia đoạn AB thành 10 đoạn bằng nhau. Tính vận tốc truyền sóng
Đường thẳng d có vectơ pháp tuyến là n= (-2;-5). Đường thẳng ∆ vuông góc với d có 1 vectơ chỉ phương là?
Tìm m để hàm số y=x3-3mx2+m có 2 điểm cực trị thẳng hàng với A(-1;3)
I wonder if I would answer the following personal questions, . OPPOSITE
A. individual Bprivate C public D.owned
The thief hid his precious possessions in the well behind his house. OPPOSITE Ainexpensive B, robbed C. valuable -D, worthless
These boys look very lovely. They are very brilliant OPPOSITE
A. naughty B. disobeyed C. stupid D. intelligent
He was respected by all of the colleagues who used to work with him for years. OPPOSITE
A.looked down on B. ignored C. complied with D. looked up to
Adverse weather conditions made it difficult to play the game. OPPOSITE
A. favorable B. bad C. comfortable D. severe
Laws on military service since 1960 still hold good. CLOSEST
A. remains for good B. is still in good condition
C. stands in life D. remains in effect
She was a devoted teacher. She spent most of her time teaching and taking care of e
students. CLOSEST
A. honest B. dedicated C. lazy D. polite
A wedding is a meaningful event CLOSEST
A. important B. unimportant Csad D. sorrowful
He seems to make the same mistake over and over again CLOSEST
A. for good B. by the way C repeatedly Cin vain
He inherited a lucrative business from his father CLOSEST
A. bright B. losing Cwealthy Dprofitable
I like this new washing machine because it is easily carried about CLOSEST
A. affordable B. portable Ceffective D. useful
9 If we had taken his sage advice, We wouldn’t be in so much trouble now
A. rational B. wise Cwilling D, eager
CLOSEST His tenacious personality made him top saleperson in the company Acareful B. explosive Cpersistent D. charming
If the weatherman has predicted accurately tomorrow will be a perfect day for our picnic CLOSEST
A fully B. correctly Ccarefully D acutely
After her husband’s death, Mrs brown spent several melancholy years alone in their apartment. CLOSEST
A. tired B. lonely Cbrief Dsad
As she aged, she became more garrulous CLOSEST
A. talkative B. passive Csickly Dgrey
l infer from his statements that he has no intention of paying the bill CLOSEST
A. conclude B.look . cimply Dhear
His physical condition was no impediment to his career as a violinist CLOSEST
A. help B. impatience Chindrance Dimpossibility
One of the superstitions related to. Weddings is that the bride should wear something blue CLOSEST
A. rules of conduct B. religious Cmissions Dirrational beliefs
. It was inevitable that women would be sent into space along with men CLOSEST
A. unlikely B. fantastic Cinfluential Dunavoidable
you dropped it down the stairs? You're lucky it us till in one___!
A. whole B. piece Centirely Dunit
When __ a European, we should stick to the last name unless he suggests that we use his first name
Aspeaking Bdiscussing Ctalking Daddressing
You should make a list of things to do and__ them if you want to work effectively
Ado B. arrange Cprioritize Dmake
When getting into troubles, Jack never __ on other people for help
Adetermines B. influences C relies Dmanages
___ communication skill plays ann important role in career success
A, personal B. Individual C. Interpersonal Dinteractive
It was essential for him to be financially___of his parents,so he decided to find a part-time job
Adependent Bindependent Cdependable Dundependable
All the three boys seem to fall___ over heels in love with her
A. head B. heart Cmind Dsoul
I don't know what to say to break the___ with someone I’ve just met at the party
Aair B. ice Cleg Drule
He kept his secret relationship for years , but eventually the truth___
Acame out B. came through Cwent out Dturned out
Please leave this space__ on the enrolment form
Aabsent Bblank Cmissing Dundone
We hope very much to find a __ solution to the problem
A satisfied Bsatisfactory Dsatisfying Dsatisfaction
Hats like this may have been fashionable in the 60’s but now they are _ the times
Abehind Bover Cbeneath Dunder
Tony’s parents check his relationship on FB account everyday, he hates being under__ all the time
A scrutiny Battack Cpressure Dcontrol
It’s considered___ to interrupt others while they are talking
Aarrogant Bimpolite Chelpful Dpolite
I’m sorry I snapped at you like that, but I’m in a bad__
A.mind Bmood Cmentality Dmanner
These facts may be familiar ___you. A, to B, with C. in D at
I ____an old friend of mine in the street this morning. We haven't seen each other for ages.
A.ran into B. ran out C. came over D. came round