2. 外语
  3. Angles of less than 90° are called ______angles.

Angles of less than 90° are called ______angles.

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问题 Angles of less than 90° are called ______angles.
选项 A、acute
B、blunt
C、sharp
D、dull
答案A
解析 acute a.锐的(an acute angle锐角)。blunt a.钝的。sharp a.锋利的，锐利的。dull a.钝的；愚钝的。
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