甜美多汁的桃肉、西瓜籽、葵花籽分别是由下列哪项发育而来的？[

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问题选择题

甜美多汁的桃肉、西瓜籽、葵花籽分别是由下列哪项发育而来的？ [ ]

A．子房、子房壁、胚珠

B．子房、胚珠、子房壁

C．子房壁、胚珠、子房

D．胚珠、子房、子房壁

答案

阅读理解

阅读短文，用合适的单词完成下列短文。

A Foreign Teacher

Mr. Brown is from New York (纽约) of America. He teaches English in our school. He wears a

white shirt and black trousers every day. He speaks English very well. He can speak some Chinese,

but not too much. He likes teaching in China very much. He often says the Chinese are very friendly.

We like his lessons very much. He is our good friend.

Mr. Brown is an ______ (1). He is a ______ (2) of English in our school. He is ______ (3) a white

shirt and black trousers every day. He speaks very ______ (4) English. He can speak some Chinese,

______ (5), but ______ (6) ______ (7) ______ (8). He often says the Chinese ______ (9) are very

friendly. We all like him and his ______ (10).

单项选择题

乳汁中含量较恒定的矿物质是

A．钙
B．铁
C．维生素A
D．维生素D
E．维生素B₁