A.Scientists use the information the transmitter provides to save the panther.
B.The transmitter helps scientists learn about the panther’s habits.
C.The transmitter is fastened to the panther’s body for tracking purposes.
D.The Florida panther is the first animal to be attached with the transmitter.

A.tend to remain hidden from people
B.are abundant in number
C.live with the spirit of ghosts
D.can be easily followed

A.The chance of panthers’ survival
B.The panther’s exact location
C.The biologists on the ground
D.The total number of panthers

A.The use of a tracking device to protect Florida panthers.
B.Different methods of tracking Florida panthers.
C.Scientists dedicated to saving Florida panthers.
D.Florida panthers’ secretive nature and habits.

A.gardens in Madrid, New York, and Chicago
B.people growing plants on roofs and walls
C.private gardens in the city's unused spaces
D.how to grow your own food in the city

A.\({z^2} + 2z + 3 = 0\)
B.\({z^2} - 2z - 3 = 0\)
C.\({z^2} - 2z + 3 = 0\)
D.\({z^2} + 2z - 3 = 0\)

A.Kim loại Cu tác dụng với dung dịch HNO3 loãng.
B.Ở nhiệt độ thường, H2 khử được CaO.
C.Cho Zn vào dung dịch CuSO4 có xảy ra ăn mòn điện hóa học.
D.Kim loại Ag dẫn điện tốt hơn kim loại Cu.

A.Polietilen.
B.Poli(metyl metacrylat).
C.Poli(etylen terephtalat).
D.Polibutađien.

A.NaCl.
B.Cu(NO3)2.
C.NaOH.
D.Mg(NO3)2.

A.CO.
B.CO2.
C.H2.
D.N2.