在初生纹孔场或纹孔膜中，都有胞间连丝相互连通。( )
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Over a third of the population in that African country was estimated to have no__________
A. excess
B. SucCess
C. process
D. access
叶绿体是进行光合作用的质体，它只存在于植物叶肉细胞中。( )
What is the best topic of the passage？
A. John Kennedy and His Prominent Family．
B. The Political Influence of Kennedy Family．
C. The Success of the Youngest American President．
D. John Kennedy，the Most outstanding President．
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