【简答题】(7) 环毛蚓的受精作用是在____内进行的。排泄器官是____
【简答题】环毛蚓的排泄器官为____,血液是红色,是因为血浆中有____。
【简答题】reversing gear______________________。
【简答题】I.Using the Right World Fill in the blanks with the words given below, changing the form if necessary. Fill in each blank ...
【简答题】(5) 环毛蚓的排泄器官为____,血液是红色,是因为血浆中有____。
【简答题】Translate the following into Chinese. I. gas turbine( );2. compression ignition engine( );3, medium-speed diesel engine( );4. slow-speed diesel engine( );5. two-stroke cycle( );6.revers...