叉车转向系统的功用是什么?
参考答案:
改变叉车的行驶方向或保持叉车的直线行驶。
下列关于抗原的叙述中,哪项是错误的
A.分子量越大,免疫原性越强
B.直链结构的蛋白质免疫原性较环状结构蛋白质强
C.聚合状态的蛋白质免疫原性较非聚合状态蛋白质强
D.大分子物质必定免疫原性强
E.A+B
The Terracotta Warriors is known ________ one of the most interesting archaeological
discoveries in the world, which is called “the eighth wonder of the world.”
A for B to C as D by