技术站应根据调车作业需要，分别修建简易、非机械化、机械化、（）或自动化驼峰。
参考答案：半自动化
It`s on the festival occasion ________the family get together ________he misses his father.
A where; that B which; when C when; that D that; when
血浆晶体渗透压主要来自血浆的
A．Na+B．葡萄糖C．白蛋白D．球蛋白E．纤维蛋白
