How many layers are in a typical landfill liner between the clay in the ground and the solid waste?
Select one:
a. 2
b. 3
c. 4
d. 10

answer; ///i believe the correct answer is (aids) acquired immune deficiency syndrome;

i think a) betsy can donate only blood to mark is correct because, mark and betsy have the same blood type. whereas nobody else has b+ blood so betsy can't donate to them.

enhanced global partnerships and exploration capabilities may advance international preparedness for protecting the earth from catastrophic events such as some asteroid strikes, advancing collaborative research on space weather and protecting spacecraft by developing new means for space debris removal.

all matter is made up of atoms

in any element all atoms are the same

elements in a compound are always in a constant ratio: apex