在体育锻炼过程中,心率最好控制在最大心率的60%-80%之间对身心健康有益。( )
A. 对
B. 错
Choose the correct answer according to what you hear.[音频]
A. The self-driving system was faulty.
B. The car was moving at a fast speed.
C. The man in the car was absent-minded.
D. The test driver made a wrong judgment.
[音频]
A) They lost contact with the emergency department.
B. They were trapped in an underground elevator.
C. They were injured by suddenly falling rocks.
D. They sent calls for help via a portable radio.
[音频]
A. The majority of drivers prefer to drive and park themselves.
B. Human drivers become easily distracted or tired while driving.
C. Most drivers feel uncertain about the safety of self-driving cars.
D. Most drivers have test driven cars with automatic braking features.
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