发动机气门积碳不会造成()
A.怠速抖动
B.进气量不足
C.冷车难启动
D.喷油增加
参考答案:D
_____ our eating ties in with our stress level is being studied and soon it will be clear. [ ]
A. That
B. How
C. Where
D. What
下面哪个人物不是我国古代的医学家:()
A、李时珍
B、张仲景
C、陶行知
D、孙思邈