【单选题】The dog was killed by the boss of this restaurant without _______.
【单选题】用曲轴转角表示的进、排气门开闭时刻和开启持续时间,称为( )。
【单选题】The dog was surprised to see his______in the pool of water.
【简答题】The dog was different from others in that A) it could stand only on its hind legs. B) it had only two legs C) it was very attractive D) it had a very big abdomen
【简答题】用曲轴转角表示的进、排气门开闭时刻和开启持续时间,称为 。
【单选题】职业性有害因素是指
B.
不良劳动条件下存在的能对健康产生不良影响的职业因素
E.
劳动过程中所有能对健康产生不良影响的职业因素
【单选题】职业性有害因素是指
D.
生物性有害因素、 物理性有害因素、 化学性有害因素
【单选题】The dog was buried ______.
C.
on the top of a mountain
D.
at the side of a river
【单选题】用曲轴转角表示的进、排气门开闭时刻和开启持续时间,称为( )
【单选题】The dog was very bright.