Related Questions

The mixing vat in a factory receives liquid ingredients through six separate value--- labeled R.S.T.U,Y and Z -- each of which has exactly two settings: open and closed.The mixing vat operator must ensure that each valve is set open or closed according to the following conditions: If T is open, both S and Z must be closed, R and Z cannot both be closed at the same time; If Y is closed, Z must also be closed;S and U cannot both be open at the same time. If Z is open, which of the following must be true?
A S is open
B T is open
C U is open
D y is open
The mixing vat in a factory receives liquid ingredients through six separate value--- labeled R.S.T.U,Y and Z -- each of which has exactly two settings: open and closed.The mixing vat operator must ensure that each valve is set open or closed according to the following conditions: If T is open, both S and Z must be closed, R and Z cannot both be closed at the same time; If Y is closed, Z must also be closed;S and U cannot both be open at the same time. If R is closed and U is open, which of the following must be true?
A S is open
B T is open
C T is closed
D Y is closed
Change the voice: Open the door.
A Let the door to be open
B Let the door to be opened
C Let the door open
D Let the door be opened
'Open the door in the living room.' Change the voice.
A Let be opened the door in the living room.
B Let the door in the living room should be opened.
C Let the door in the living room be opened.
D The door in the living room might be opened.
The mixing vat in a factory receives liquid ingredients through six separate value--- labeled R.S.T.U,Y and Z -- each of which has exactly two settings: open and closed.The mixing vat operator must ensure that each valve is set open or closed according to the following conditions: If T is open, both S and Z must be closed, R and Z cannot both be closed at the same time; If Y is closed, Z must also be closed;S and U cannot both be open at the same time. If the maximum number of valves that can be closed at the same time are closed which of the following must true?
A R is open
B S is open
C T is open
D Z is open
The mixing vat in a factory receives liquid ingredients through six separate value--- labeled R.S.T.U,Y and Z -- each of which has exactly two settings: open and closed.The mixing vat operator must ensure that each valve is set open or closed according to the following conditions: If T is open, both S and Z must be closed, R and Z cannot both be closed at the same time; If Y is closed, Z must also be closed;S and U cannot both be open at the same time. Which of the following, if given to the mixing vat operator as an instruction, would not determine the setting of any other valve ?
A S must be open
B T must be open
C U must be open
Change the voice: Shut the door at once.
A The door should be shut at once.
B Let the door to be shut at once.
C The door be shut at once.
Change the voice: Shut the door.
A The door is no be shut.
B The door may be shut.
C Let the door be shut.
D Let be door shut.
There are 5 doors to a lecture room. In how many ways can a student enter the room through a door and leave the room by a different door?
A 10
B 20
C 9
D 325
The boy who is begging form door to door is an orphan. (Make it simple)
A The boy is an orphan and begging from door to door.
B The orphan boy is begging from door to door.
C The by begging from door to door is an orphan.
D The door to door begging boy is an orphan.

Next steps