Examples of stress that can predispose fish to diseases are:
A. poor water quality.
B. poor feed quality.
C. environmental contamination
D. all of the above.
D
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In proximity limit switches, the distance between the pickup and drop-out point is called the ____.
a. attenuation range b. hysteresis c. trip point d. break curve
All of the following are true statements about colonial newspapers on the eve of the Revolution EXCEPT
A. there were about forty different newspapers throughout the colonies. B. they were typically published twice a week. C. they proved to be powerful vehicles for airing grievances and rallying support against England. D. they consisted of a single large sheet of paper folded once. E. the news they contained often lagged weeks behind the events themselves.
Why are thermostatic expansion valves often used as the outdoor metering device for the heating cycle?
A) TEVs are easier to install on the outdoor coil. B) The TEV can modulate the refrigerant flow over the wide range of temperatures experienced in the heating mode. C) TEVs allow the system pressures to equalize in the off cycle, allowing the use of low starting torque compressors. D) TEVs can be adjusted in the field to match the heat pump's performance with the climate it will be operating in.
Why did almost a third of the poleis decide not to resist the second Persian invasion?
a. Many of them lacked the funds to contribute to the powerful navy Themistocles was building for the protection of Greece. b. Many of them already belonged to the Peloponnesian League, headed by Sparta, which had made a separate peace with Persia already. c. Many smaller poleis realized that they had as much to fear from Sparta, Athens, and hostile neighboring poleis as they did from Persia. d. Many smaller poleis believed that incorporation into the Persian Empire would enrich them at the expense of larger poleis such as Athens and Sparta.