【简答题】操纵轿厢安全钳装置的限速器的动作应发生在速度至少等于额定速度的( )。
【判断题】杂物电梯操纵轿厢安全钳装置的限速器的动作应发生在速度不小于额定速度的()
【单选题】下列因子中对于呼吸运动调节最重要的是( )
【多选题】We can call America __________.
A.
the United States of America
【单选题】操纵轿厢安全钳装置的限速器的动作应发生在速度至少等于额定速度的( )。
【多选题】ɑi ei ɑo ou四个复韵母的发音有何特点?
B.
开头的元音发得响亮、清晰,时间较长,后面的元音轻而短。
【判断题】根据JG135规定,操纵轿厢安全钳装置的限速器的动作应发生在速度不小于额定速度的115%,但不大于4.25m/s。对重安全钳装置限速器的动作速度应比轿厢安全钳装置的限速器动作速度至少高10%,但不大于4.4m/s。
【单选题】We can conclude that ______ .
A.
education has no national boundary
B.
America attaches greater importance to education than Britain
C.
students in America receive better education than in Britain
D.
failure in education might lead to huge loss of both money and human resources
【单选题】According to the passage, we can infer that ______.
A.
the present ozone level in America is safe to people
B.
there is no direct connection between ozone and death rates
C.
the study of ozone and death rates has been done several times
D.
America has a worse problem with ozone than other countries