单项选择题

表面结构的注写和读取方向与尺寸的注写和读取方向一致。表面结构要求可标注在轮廓线上，其符号应从材料外指向并接触表面。必要时，表面结构也可用带箭头或黑点的指引线引出标注。
A、正确
B、错误

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单项选择题

Questions 36 to 40 are based on Text Two.
Which is wrong about history?
A、 History is the whole of the human past.
B、 History is the recorded past such as folk tales, artifacts, or written documents.
C、 History is a cut-and dried matter of memorizing “facts”.
D、 History is what historians write about the past.

单项选择题

急性大出血少尿主要原因是
A、肾小球毛细血管压明显降低
B、血浆胶渗压升高
C、囊内压升高
D、滤过膜通透性降低