2. 外语
  3. The ______ teeth, which are not easily fallen off, come in after the baby teeth.

The ______ teeth, which are not easily fallen off, come in after the baby teeth.

admin2012-03-02  19
问题 The ______ teeth, which are not easily fallen off, come in after the baby teeth.
选项 A、lasting
B、permanent
C、durable
D、enduring
答案B
解析 题意是：不容易脱落的______牙齿在乳牙之后长出来。[B]permanent“永久的，持久的”，强调延续时间之长，符合题意。[A]lasting“永久的，持续的”，强调无限地继续下去，超出常态或预料；[C]durable“耐久的”，强调有防变、防腐等能力；[D]enduring“耐久的，长久不变的”，强调能够经受时间或环境的考验而长期地存在下去。因此，这三项都不符合题意。
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大学英语四级

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