Which of the followings affect an ecosystem as the whole?
A
vấn đề nào sau đây ảnh hưởng đến toàn bộ hệ sinh thái?
A. Ô nhiễm nước bề mặt
B. Sự ô nhiễm đất
C. Ô nhiễm nước ngầm
D. Ô nhiễm không khí
=> đáp án A
Thông tin: Changes in the water chemistry due to surface water contamination can affect all levels of an ecosystem.
Which of the followings is NOT an evidence of monitoring studying?
It can be a very (30) __________ surprise if you expect to shake hands and get a kiss or a hug instead.
According to the passage, what can be learnt about passive students?
Which of the followings is the flow of water from the ground to the surface?
But things are more likely to turn (80) ________ well if you persevere and stay positive.