若生物碱沉淀试剂未显阳性，则说明该物质中不含生物碱
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根据以下句子，选出最符合句意的一个单词The party has threatened to______the election becauseit believes it will not bedemocratic.
A. ban
B. boycott
C. veto
D. refuse
This passage mainly tells us about:
A. The quality of one's life is what is important.
B. Dr. King was awarded the 1964 Nobel Peace Prize.
C. Dr. King fought for civilrights all his life.
Dr. King led a bus boycott in Alabama.
Why was Dr. King awarded the 1964 Nobel Prize?
A. Because he led the first large scale U.demonstration against segregation.
Because his nonviolent resistance to racial prejudice.
C. Because he made great contribution to society at young age.
D. Because he had a high-quality life
According to the text, which of the following statement is wrong?
A. Dr. King studied theology at Morehouse College
B. Dr. King died four years after he received the Nobel Prize.
C. Dr. King was fatally shot in 1968.
D. The Civil Rights Act was signed because of the hard work of Dr. King
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