单项选择题 In this section, you will hear a long conversation. At the end of the conversation, some questions will be asked about what was said. Both the conversation and the questions will be spoken only once. After each question there will be a pause. During the pause, you must read the four choices marked A), B), C) and D), and decide which is the best answer.A、Earn some money. B、Go to a summer school. C、Take a vacation. D、Stay at home.

单项选择题 毛石基础的施工工艺流程的最后一步为（  ）。 A、砌筑 B、勾缝 C、装饰抹灰 D、喷漆

多项选择题 关于上皮样血管内皮瘤,下列说法正确的是()