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【单选题】
关于光敏电阻，下列说法错误的是( )。A.
一般暗电阻越大，亮电阻越小，光敏电阻的灵敏度越高。
B.
在给定的电压下，光电流的数值将随光照增强而增大。
C.
光敏电阻的光照特性描述的是光电流I和光的频率之间的关系。
D.
选用光敏电阻时应当把元件和光源的种类结合起来考虑，获得满意的结果。
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举一反三
【简答题】异常乳的种类有哪些?
【单选题】The author describes DreamWorks as a wandering tribe because
A.
it is an unsettled tribe that is always on the move.
B.
it is abandoned by such big companies as Universal.
C.
it changes partners frequently these years.
D.
it finally begins its partnership with Disney.
【单选题】Which of the following is NOT a settled agricultural tribe?
A.
Hohokam
B.
Hopi
C.
Pueblo
D.
Navajos
【单选题】Para. 2 shows that
A.
the economy of the native tribe develops rapidly.
B.
the tribe is good at mining copper.
C.
there is a problem that holds the tribe back from developing.
D.
copper is a necessary part of the tribe's building.
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