【简答题】听音,如果每组图画正确打“√”,否则打“×”。 ( ) 1. ( ) 2. ( ) 3.
【单选题】Some children have never seen a dentist before starting school.
【简答题】听音判断,对的打“√”,错的打“×”。 1. 2. 3. ( ) ( ) ( )
【单选题】Before starting any diesel or gasoline engine, which of the following must be checked?____.
【简答题】听音,对的打“√”,错的打“×”。 1. 2. 3. 4. ( ) ( ) ( ) ( )
【简答题】情景会话。情景适当的图打“√”,否则打“×”。 ( ) 1. ( ) 2. ( ) 3.
【单选题】Before starting an air compressor, It should be _____.
【简答题】听音,判断正误,对的打“√”,错的打“×”。 1. 2. 3. ( ) ( ) ( )
【简答题】听音,判断正确打“√”,错的打“×”。 1. 2. 3. 4. ( ) ( ) ( ) ( )
【单选题】Before starting, the cylinders and pistons must be warmed up ( ).