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【单选题】A Paperless Classroom Imagine a classroom missing the one thing that’s long been considered a necessary part to reading and writing—paper. Not notebooks, no test paper. Nor are there any pencils or pe...
A.
A paperless classroom is a good way to save paper.
B.
Online test is possible in a paperless classroom.
C.
The computer in a paperless classroom is very reliable.
D.
Teachers can give the exam results on the network.
【单选题】两岁以下的婴儿失去知觉时，要用一只手垫着背部，支撑起婴儿的头颈。用另一只手。按压胸骨下部的位置，每分钟100次。压下的深度为()厘米，一次呼吸配合5次压迫。
A.
1.5-2.5
B.
4.5-5.5
C.
10
D.
0.5-1.5
【单选题】两岁以下的婴儿失去知觉时，要支撑起婴儿的头颈，用另一只手按压胸骨下部的位置，每分钟100次，压下的深度为1.5—2.5厘米，一次呼吸配合（）次压迫。
A.
3
B.
7
C.
5
D.
10