皮皮学，免费搜题
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【单选题】
关于能源,以下说法中不正确的是()A.
煤、石油、天然气等燃料的最初来源都可追溯到太阳能
B.
核能和地热能来自地球自身
C.
潮汐能来源于月球引力做功
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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】设集合 A={1,2,3}，则A上的双射函数是( )。
A.
{<1,1>,<2, 3>,<3, 1>}
B.
{<1,2>, <2,2>,<3, 1>}
C.
{ <1,2>,<2, 1>,<3,3>}
D.
{<1,1>,<2,1>, <3,1>}
【简答题】任务型阅读. There are three persons in my family. They are my father, my mother and I. My father works in a computer company (公司). He is very busy. He does many things every day. He gives much money to the...
【单选题】which organ does the picture show?
A.
thyroid gland
B.
thymus
C.
skin
D.
spleen
E.
lymph nid
【单选题】She broke my bicycle lamp_______; that was why Jane was to blame.
A.
accidentally
B.
accurately
C.
positively
D.
deliberately
【简答题】设集合 A={ 1,2,3,4} ,则 A 上的置换共有 个
【单选题】which organ does the picture shows:
A.
stomach
B.
esophagus
C.
small intestine
D.
large intestine
E.
appendix
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