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- 1. Multiple Choice
Great quantities of water circulate either temporarily ________ in a concentrated flow of streams and rivers.
and permanent
and permanently
or permanent
or permanently
- 2. Multiple Choice
Astronauts are expected to be capable of operating at peak efficiency in outer space in both normal _________ emergency situations.
nor
and
or
but also
- 3. Multiple Choice
An astronomical observatory is a station--either a building _________ a group of building--used for the study of the heavens.
or
and
but also
nor
- 4. Multiple Choice
In commensalism, tiny plants live out their lives in the human body and derive their food from it, but probably neither harm nor _______ the host in any way.
to help
helping
helped
help
- 5. Multiple Choice
Plants require both large amounts of carbon, oxygen and hydrogen ____ smaller quantities of phosphorus, potassium and calcium.
and
or
nor
but also
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