【单选题】By mentioning the study of IEEE Spectrum, the author intends to______.
A.
prove that the danger of using cell-phone on plane does exist
B.
advocate that all airlines should provide Wi-Fi service
C.
explain how cell-phone may endanger a flight
D.
inform. readers of which devices should be allowed to use on plane
【简答题】选做:有条件同学,按照徒手心肺复苏术具体步骤金和儿童、婴儿徒手心肺复苏流程,拍摄儿童和婴儿心肺复苏的练习视频。
【单选题】The telephone has intensified conflicts among people because ______.
A.
it increases the danger of war
B.
it provides services to both the good and the malicious
C.
it makes distant communication easier
D.
it breaks up the multi-generation household
【简答题】Watch the video clip again, and finish the compound dictation descendant 后代 后裔 orator 演说家 figure 人 Victorian 维多利亚时代的 Born
in Blenheim palace on the 30th of November, 1874, he was a (...
【单选题】What can we infer from the passage?
A.
American people need less sleep than others.
B.
The dangers of sleepiness are still unknown.
C.
The traditional attitude toward napping is wrong.
D.
Napping can reduce stress.