剖面图中，剖切位置线用b线宽的两段粗实线绘制，每段长度为mm，剖视方向线为mm长的粗实线。
A. 4-6、6-10
B. 6-10、4-6
C. 6-10、4-8
D. 4-8、6-10
查看答案
剖面图的图名后要注明“展开”二字的剖面图有
A. 阶梯剖
B. 半剖
C. 分层局部剖
D. 旋转剖
外汇期权交易中期权卖方的风险较大。（）
A. 对
B. 错
当市场汇率上升高于期权协定价格时，购买外汇期权者将履行期权合约。（）
A. 对
B. 错
Questions 9 to 12 are based on the conversation you have just heard.Question 9
A. He attended a competition and won.
B. He had been playing a game all night.
C. He had been preparing for his math test.
D. He studied the whole night without sleep.
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