No one paid any attention to this odd-looking man who might as well have been __________(看不见的）
查看答案
Someone should stop this _______(疯狂的） old man before he really harms himself.
He had the strangest running style; he appeared to ________(拖着脚步走）
活塞环槽沟清理器用来快速清理活塞环槽沟内的积碳、油污等
A. 对
B. 错
在使用活塞环槽沟清理器时，要选择合适的刀片，在不知活塞环槽沟的高度时，可按照从大到小的顺序进行尝试选择。
A. 对
B. 错
微信支付 
支付宝支付