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【单选题】
组织学校卫生工作，应坚持()。A.
以安全卫生为主
B.
以安全保健为主
C.
以自我保健为主
D.
以预防保健为主
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皮皮学刷刷变学霸
举一反三
【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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