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【单选题】
Which of the following is NOT true?A.
a. Recycling conserves resources for the future.
B.
b. Recycling saves valuable raw materials.
C.
c. Recycling helps the environment.
D.
d. Recycling reduces the need for green technologies.
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皮皮学刷刷变学霸
举一反三
【单选题】下列说法错误的是 [ ]
A.
石油主要是由烷烃、环烷烃、芳香烃组成的混合物
B.
石油的催化重整是目前获得芳香烃的主要途径
C.
石油的催化裂解是工业生产乙烯的重要环节
D.
通过煤的干馏可获得少量芳香烃
【单选题】The sensor provides instantaneous manifold pressure information to the engine 's control unit(ECU)
A.
crank sensor
B.
knock sensor
C.
MAP
D.
throttle body
【单选题】The appearance of the used car is , it's much newer than it really is.
A.
descriptive
B.
indicative
C.
deceptive
D.
impressive
【简答题】A sensor’s ( ) indicates how much the sensor’s output changes when the measured quantity changes
【简答题】合金工具钢按用途分为哪两类?并简述合金工具钢应具备哪些性能?
【简答题】A sensor's sensitivity indicates how much the sensor's output changes when the measure quantity changes.
【简答题】营养液每次输入剂量不超过()ml,间隔时间不低于()小时,输入时温度保持恒定在()°
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