叉车在正常使用中自然产生的故障是渐进性故障。
参考答案：对
营养素的功能主要指提供能量、促进生长与组织的修复、调节生理功能三项。
It is what you do _________what you say that matters. [ ]
A. in place of
B. rather than
C. or rather
D. in spite of
