Which of the following statements is true about acid rain?
A. It is caused by sulfur dioxide and nitrogen oxide emissions.
B. It has damaged buildings.
C. It has killed fish in lakes.
D. All of these answers are correct.
Answer: D
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Middle-aged mothers are often put into the role of , the person who gathers the family for celebrations and keeps them in touch with one another
a. kinkeeper b. primary bread-winner c. familykeeper d. matriarch
The capitalist industrial system in the North
a. was economically independent of the agriculture-capitalist subeconomy in the South during the 18th and 19th centuries. b. transferred the profits from cotton and tobacco produced by slave labor into manufacturing investments. c. crashed violently with the agriculture-capitalist subeconomy of the South in the Civil War. d. b and c above.
Distributions observed in nature and research commonly approximate:
A) a kurtotic curve B) a multimodal, symmetric curve C) a normal curve D) a bimodal, asymmetric curve
One should use a chi-square test to study the change in distribution of preferred brand of toothpaste from before to after a new advertising campaign. (True or False)
Indicate whether the statement is true or false