单项选择题

A．90% copper and 10% silver.
B．90% silver and 10% copper.
C．90% silver, 9% copper, and 1% lead.
D．None of these.
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单项选择题
A．They have a great effect on everyone’’s intelligence.B．They have some effect on many people’’s intelligence.C．They have some effect on a few people’’s intelligence.D．They have no effect on most people’’s intelligence.
A．They have a great effect on everyone’’s intelligence.
B．They have some effect on many people’’s intelligence.
C．They have some effect on a few people’’s intelligence.
D．They have no effect on most people’’s intelligence.
单项选择题
A．Because the temperature can climb to 85° Fahrenheit.B．Because the temperature can climb to 95° Fahrenheit.C．Because the temperature can climb to 75° Fahrenheit.D．Because the temperature can climb to 105° Fahrenheit.
A．Because the temperature can climb to 85° Fahrenheit.
B．Because the temperature can climb to 95° Fahrenheit.
C．Because the temperature can climb to 75° Fahrenheit.
D．Because the temperature can climb to 105° Fahrenheit.
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