单项选择题

It can be inferred that the development of a fetal liver depends on ______.

A．how many months pregnant the mother is
B．how much alcohol the mother has consumed
C．how large the fetus is
D．how well the mother has taken care of the fetus
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单项选择题
According to the passage, how does the concentration of alcohol in a fetus compare to that in the mother
A．The concentration is more.
B．The concentration is less.
C．The concentration is equal in amount.
D．The concentration cannot be measured.
单项选择题
When you are looking for videos of humpback whales in the North Atlantic, which of the following search strings can give you the most precise collection of pages according to the passage
A．videos of humpback whales in the North Atlantic
B．"humpback whales" + videos + "North Atlantic"
C．"humpback whales" + videos + "North Atlantic" -Pacific
D．"humpback whales" + videos
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