21The invention of the doorstopper, though simple, had a significant impact on everyday convenience. Its purpose is ______ keeps doors open or prevents them from slamming shut, a simple contraption that safeguards walls and furniture from potential damage and provides ease of movement between spaces.21 Mark For Review21Which choice completes the text so that it conforms to the conventions of Standard English?A) straightforward: itB) straightforward itC) straightforward; and itD) straightforward, it

Don’t forget …………..the door.A) LockingB) LockC) LocksD) To lock

The airplane manufacturer realized a flaw in its design when tests revealed that the cabin door required toomuch force to be opened in an emergency: for safety purposes, the door needs to be difficult to open butnot ______.A. indelibleB. immutableC. immobileD. impossible

In the chapter, lever door handles or loop handle pulls on drawers were listed as examples of which universal design principle?Select one:a.Simple and intuitiveb.Flexibility in usec.Equitable used.Low physical effort

Match the word with the definitionQuestion 16. I want to emphasise that the door is open now:A.Elizabeth has opened the door.B.Elizabeth has been opening the door.Question 17. The action is completed now:A.Charles has sent the letter.B.Charles has been sending the letter.Question 18.Relating to the knowledge, machines, or methods used in science and industryA.undergraduateB.pursueC.technicalD.school-leaverE.qualificationQuestion 19.To do something or try to achieve something over a period of timeA.technicalB.pursueC.undergraduateD.qualificationE.school-leaver

The purpose of a deadman door controlling access to a computer facility is PRIMARILY to: