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28.What is the function of the first paragraph?
A.To give an example.
B.To present an argument
.C.To lead to the main topic.
D.To attract readers’attention.
29.What can we learn about the portals?
A.They are life-size glass boxes.
B.They have a built-in computer.
C.They reduce light reflection on the glass.
D.They consist of audio and video equipment.
30.What can we expect of the hologram technology in the future?
A.It will record live conference automatically.
B.It is helpful in telling an actual person from a digital one.
C.It will possibly take the place of conventional screens.
D.It is not likely to popularise due to high cost of the portals.
乌鲁木齐2022年高三年级诊断性自测(第一次)问卷英语试题