去龋过程中病人很敏感，并见露髓点，窝洞中尚有腐质。治疗最好选用
A. 干髓术
B. 盖髓治疗
C. 安抚治疗
D. 活髓切断术
E. 根管治疗
查看答案
What is the conversation mainly about？
A. The possible existence of life on other planets.
B. Methods for building powerful new telescopes.
C. A technical problem that astronomers can't solve.
D. The discovery of planets orbiting distant stars.
When will the vote begin？
A. On 1 January.
B. On 5 March.
C. On 22 January.
D. On 5 January.
Which of the following is to be feared by the opponents of Google？
A. Google may ignore copyright laws.
B. Google may win the court case in Paris.
C. Google may charge users for reading books.
D. Google may digitize books without authors' consent.
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