【简答题】Get familiar with the words and expressions in the list, and then listen to the passage "Mom's obesity raises newborn's heart risk" for twice. While listening, you are to take notes according to the g...
【单选题】The researchers wished to compare the six soil samples collected during experiments 1 and 2 according to permeability (ability of water to pass through them). A portion of each sample was placed in a ...
A.
one minute is sufficient time for some amount of water to escape at least some of the cups.
B.
the same amount of soil was added to all six cups.
C.
in each cup, the proportions of sand, silt, and clay were the same as in the original sample.
D.
the filters did not allow soil particles to escape through the bottoms of the cups.
【简答题】The researchers then applied meta-ysis——a technique developed by Glass——to the data from all the studies in an attempt to determine overall the relative effectiveness od different methods.