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【单选题】
原始细胞形成过程中的关键事件是A.
富含有机物的原始海洋和无机小分子
B.
具有自我复制能力的多聚体的形成和膜的出现
C.
原核细胞向真核细胞的演化
D.
地球上液态水的出现
E.
单细胞生物细胞生物的演化
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【简答题】Within EU primary education, a clear majority of pupils choose to study English like a foreign language. Indeed, learning English is mandatory in several【M1】______ countries within secondary education...
【简答题】Over 60﹪of pupils in South African schools choose English for learning and teaching, but only 7﹪of pupils speak English as their home language, a recent South Africa survey shows. Out of the country’s...
【单选题】已知两正弦电压: u 1 =10cos ( 100t+45 0 ) V , u 2 =2sin ( 100t+45 0 ) V ,则 u 1 与 u 2 的相位差为( )。
A.
0 0
B.
90 0
C.
180 0
D.
- 90 0
【单选题】_______ interesting it is to talk with some American pupils in English!
A.
How
B.
How an
C.
What
D.
What an
【简答题】Look, the pupils ________ (have) an English class.
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