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【单选题】
图 1 电路中电阻 R 的伏安特性曲线如图 2 所示。其电阻值 R 为 () 。A.
2 W
B.
- 2 W
C.
- 0.5 W
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举一反三
【单选题】With the flowers ______ everywhere, the park looks beautiful.
A.
to bloom
B.
blooming
C.
be blooming
D.
to be blooming
【单选题】Which of the following statements is true?
A.
Developing fever is the privilege of warm-blooded animals, so sick lizards can not run a fever.
B.
Invertebrates also have the ability to raise their temperature.
C.
The internal temperatures of warm-blooded creatures are independent of the weather, so are the cold-blooded animals.
D.
Sick lizards move into the sun to develop fever.
【单选题】Which of the following statements is true?
A.
Developing fever is the privilege of warm-blooded animals, so sick lizards can not run a fever.
B.
Invertebrates also have the ability to raise their temperature,
C.
The internal temperatures of warm-blooded creatures are independent of the weather, so are the cold-blooded animal.
D.
Sick lizards move into the sun to develop lever.
【简答题】以锂为负极的原电池
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