Which of the safety developments is NOT mentioned in the passage？
A. Radars that can help drivers m see obstacles in fog.
B. Devices that can help drivers to see through big vehicles.
C. improvements in seat belts, pedal controls and tyres.
D. Windscreens that can help drivers to improve their vision.
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The number of students wishing to take the course of engineering ethics is declining at Texas A&M University.
A. Right
B. Wrong
C. Not mentioned
What does paragraph 3 mainly discuss？
A. Different effects of caffeinated coffee and decaf on sleep,
B. Different findings of Lotan Shilo and a team about caffeine.
C. The fact that the subjects slept 415 minutes per night after drinking decal.
D. The proof that the subjects took half an hour to fall asleep.
《工业炉砌筑工程施工及验收规范》规定，工业炉砌筑冬期施工时，高铝水泥耐火浇注料的温度不应超过()。
A. 20℃
B. 30℃
C. 40℃
D. 50℃
《钢结构工程施工质量验收规范》规定，钢网架结构总拼及屋面工程完成后应分别测量其挠度值，且所测的挠度值不应超过相应设计值的()倍。
A. 1.10
B. 1.15
C. 1.20
D. 1.25
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