8 câu hỏi
What does the passage mainly discuss?
Marine pollution and its many forms
Noise and its disruptive effects on marine life
Various kinds of harmful pollutants
The end of the “dilution” era
The word "negligible" in paragraph 1 is closest in meaning to ____________.
serious
insignificant
unpredictable
positive
It can be inferred from paragraph 2 that the “dilution” policy is related to __________.
dealing with the problems of water pollution
helping the ecosystem of the oceans flourish
neglecting the effects of dumping trash into the oceans
treating harmful materials in the oceans properly
The word "they" in paragraph 4 refers to ______.
ocean’s depths
man-made pollutants
marine organisms
the oceans
The word "spawn" in paragraph 5 can be best replaced by ______.
appear
prevent
produce
limit
According to the passage, nitrogen-rich fertilizers ______.
are created by massive blooms of algae
cause a shortage of oxygen in the ocean water
do not relate to the disappearance of marine life
cannot be found inland
Which of the following statements is NOT supported in the passage?
Many pollutants deposited in the oceans finally become part of the global food chain.
It is apparent that the oceans have been polluted for a long time.
Industrial wastes and agricultural run-off are blamed for the degradation of the oceans.
The oceans in the past were more contaminated than they are now.
Whales and dolphins are mentioned in the final paragraph as an example of marine creatures that ______.
can communicate with each other via sound waves
can survive earthquakes because of their large bodies
suffer from loud or persistent sounds at sea
are forced to migrate because of water pollution