问题
单项选择题
螺纹画法规定，外螺纹的大径（牙顶）用（）表示。
A.细实线
B.点划线
C.粗实线
D.虚线
答案
参考答案：C
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螺纹画法规定，外螺纹的大径（牙顶）用（）表示。
A.细实线
B.点划线
C.粗实线
D.虚线
参考答案：C
| 从方框中选择恰当的句子完成对话，其中有两项多余。 | |
| A: Tomorrow is Saturday. What do you usually do on Saturdays? B: 1 What about you? A: I often go to the movies. B: I like movies, too. How often do you go to the movies? A: 2 B: What is your favorite film? A: 3 B: Whom do you usually go with? A: 4 B: Are you going to the movies this weekend? A: Yes. Would you like to go with us? B: I'd love to, but I have to shop then. 5 A: Thank you. Goodbye!
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