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【单选题】
轴向直廓蜗杆在垂直于轴线的截面内,齿形是 ( ) 。A.
渐开线
B.
延长渐开线
C.
螺旋线
D.
阿基米德螺线
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举一反三
【简答题】Passage 1 Listen to the passage and choose the best answer.
【单选题】Passage 1 Listen to a short passage and choose the best answer to each question you hear.
A.
She worked as an interpreter in a company.
B.
She volunteered to work in a Spanish church.
C.
She acted as a tourist guide on a trip to Mexico.
D.
She taught Spanish speakers how to speak English.
【单选题】Passage 1 Listen to a short passage and choose the best answer to each question you hear.
A.
It aroused in her a strong interest in Spanish culture.
B.
It excluded the use of other languages in the classroom.
C.
It proved to be an unbalanced way to learn the language.
D.
It explored the cultural and language elements in great depth.
【单选题】Passage 1 Listen to a short passage and choose the best answer to each question you hear.
A.
She worked ahead of schedule and skipped a level.
B.
She enjoyed the traditional method of learning Spanish.
C.
She felt discouraged while studying in the top-level class.
D.
She showed dissatisfaction with the slow pace of her class.
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