A white high school student is worried about her upcoming orchestra concert, but calms herself down by thinking, "We have five Chinese students playing violin and viola. They've got the Chinese advantage in music, so the concert will be just fine." This is an example of

Prejudice

Explanation:

Prejudice is a negative preconception of of an individual that often leads to unfavourable attitude towards such individual. Prejudice may arise from a baseless stereotyped beliefs about an individual's gender, social class, age, beliefs, values, religion, sexuality, race/ethnicity, language, political affiliation, nationality, beauty, occupation, education or other personal characteristics that can influence (especially negatively) how a person behaves towards such individual.

From this question, the white student has prejudiced opinion about the concert based on the ethnic background of the Chinese students

two jet streams that directly affect the formation of weather in the continental part are a polar jet and a subtropical jet. they are responsible for the transportation of weather systems, which directly affect people. the polar front is the boundary between cold air from the north pole and warmer equatorial air. both the polar jet and the subtropical jet blow from the west to the east, and follow the boundary between cold and warm air.

the strongest jet streams are polar jets, while subtropical jets are somewhat weaker.

the right answer is c. the polar jet stream is generaly stronger than the subtropical jet stream.

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