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【判断题】
两个对立事件的概率和是1.A.
正确
B.
错误
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】在磷掺杂浓度为2×1016cm-3的硅衬底(功函数约为4.25eV)上要做出欧姆接触,下面四种金属最适合的是( )。
A.
In (Wm=3.8eV)
B.
Cr (Wm=4.6eV)
C.
Au (Wm=4.8eV)
D.
Al (Wm=4.2eV)
【单选题】--___________? –I went to the mountains.
A.
Where did you go on vacation?
B.
What are you doing for vacation?
C.
How did you go to the mountains?
D.
How often do you go to the mountains?
【单选题】在磷掺杂浓度为2×1016cm-3的硅衬底（功函数约为4.25eV）上要做出欧姆接触，下面四种金属最适合的是（A在磷掺杂浓度为2×1016cm-3的硅衬底（功函数约为4.25eV）上要做出欧姆接触，下面四种金属最适合的是（A在磷掺杂浓度为2e16 cm-3的硅衬底（功函数约为4.25eV）上要做出欧姆接触，下面四种金属最适合的是（）
A.
In (Wm=3.8eV)
B.
Cr (Wm=4.6eV)
C.
Au (Wm=4.8eV)
D.
Al (Wm=4.3eV)
【单选题】According to the professor, where did tulips originate?
A.
In the mountains of central Asia
B.
In the region around Istanbul in Turkey
C.
In the sandy soils of the Netherlands
D.
In the forests of northern Europe
【单选题】—Did you go to the beach with your parents last weekend? —No, we ________ went to the mountains instead.
A.
both
B.
all
C.
either
D.
neither
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