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【判断题】
目前我国货物运量绝大部分是由铁路运输承担的。A.
正确
B.
错误
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举一反三
【单选题】在基质脱氢和产能的四条途径中，有三条可形成还原辅酶Ⅰ(NADH 2 )，它们是( )。
A.
EMP、HMP和TCA
B.
HMP、ED和TCA
C.
EMP、HMP和ED
D.
EMP、ED和TCA
【单选题】The nurse is caring for a client during the second stage of labor. On assessment, the nurse notes a slowing of the fetal heart rate and a loss of variability. Which is the initial nursing action?
A.
Turn the client onto her side and give oxygen by face mask at 8 to 10 L/min.
B.
Turn the client onto her back and give oxygen by face mask at 8 to 10 L/min.
C.
Turn the client onto her side and give oxygen by nasal cannula at 2 to 4 L/min.
D.
Turn the client onto her back and give oxygen by nasal cannula at 2 to 4 L/min.
【简答题】变频器中上限频率为 P1, 其设定值通常为 (
)A. 50 B. 40 C. 30 D. 60
【单选题】The heart rate of a healthy adult in quiet environment is about
A.
80-150 times/min
B.
50-80 times/min
C.
60-1OOtimes/min
【单选题】When the heart rate of a normal person exceeds 180 beats / min, the main reason for the decrease in cardiac output is
A.
shortened ventricular filling period
B.
Shorter ejection period
C.
Slowing down the ejection period
D.
Insufficient ventricular muscle oxygen supply
【单选题】The heart rate of a healthy adult in quiet environment is about
A.
80-150 times/min
B.
50-80 times/min
C.
60-100 times/min
【简答题】发送信息给以下哪一个IP地址等于是将消息发送给自己?A. A. 128.0.0.1 B. A. 127.0.0.1 C. A. 255.0.0.1 D. A. 126.0.0.1
【单选题】如果轴的工作转速为n,一阶临界转速为nc1,二阶临界转速为nc2,为了保证轴的振动稳定性,则对于刚性轴应使________。
A.
加大阶梯轴各部分直径
B.
碳钢改为合金钢
C.
改变轴承之间的距离
D.
改变轴上零件的位置
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