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【单选题】
下列关于信息技术的叙述,正确的是A.
通常认为，在人类历史上发生过四次信息技术革命
B.
随着信息技术的发展，电子出版物会完全取代纸质出版物
C.
信息技术是计算机技术和网络技术的简称
D.
信息技术伴随着人类的出现而出现
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【单选题】Which general weather conditions should you expect to find in a low pressure system?
A.
Fair weather
B.
Scattered clouds at high elevations
C.
Precipitation and cloudiness
D.
Gradual clearing and cooler temperature
【单选题】You are underway in heavy fog. You hear the fog signal of a vessel which is somewhere ahead of your vessel. You must ______
A.
slow to moderate speed and navigate with caution
B.
maintain speed and sound the danger signal
C.
stop engines and navigate with caution
D.
slow to bare steerageway and navigate with caution
【简答题】钢轨接头两端各两根轨枕应铺设高弹性橡胶垫板。橡胶垫板压溃或变形(两侧压宽合计：厚度为7mm的橡胶垫板超过15mm，厚度为10mm的橡胶垫板超过20mm)丧失作用，橡胶垫片损坏时，应进行更换。()
【单选题】You are approaching another vessel and will pass starboard to starboard without danger if no course changes are made. You should .
A.
hold course and sound a two-blast whistle signal
B.
hold course and sound no whistle signal
C.
change course to the right and sound one blast
D.
hold course and sound two prolonged and two short blasts
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