• 2022-06-08
    The value of β for a transistor is generally( ).
    A: 1
    B: less than 1
    C: between 20 and 150
    D: above 500
  • C

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    • 0

      If A and B are mutually exclusive events with P(A) = 0.70, then P(B):( ) A: can take any value between 0 and 0.70 B: cannot be determined from the information given C: cannot be larger than 0.30 D: can take any value between 0 and 1

    • 1

      In EU, the goods are cleared through the customs based on the following rules: A: duty-free if the goods value is below 22 euros. B: VATs are levied if the goods value is below 150 euros and at or above 22 euros. C: VATs and duties are levied if the goods value is at or above 150 eruos. D: VATs and duties are levied if the goods value is at or above 170 eruos.

    • 2

      比例尺又称三棱尺,常用的比例尺有(    )  A、1∶100    B、1∶500   C、 1∶350   D、 1∶150   E、1∶200 A: A、1∶100   B: B、1∶500 C: C、 1∶350 D: D、 1∶150 E: E、1∶200

    • 3

      Within the EU, goods are cleared through the customs based on the following rules ____________ . A: duty-free if the goods value is below 22 euros B: VATs are levied if the goods value is below 150 euros and at or above 22 euros C: VATs and duties are levied if the goods value is at or above 150 euros D: VATs and duties are levied if the goods value is at or above 170 euros

    • 4

      French people generally have less physical contacts than British people.