正确答案: A

直生胚珠

题目：有一植物种子，种孔和种脐处在相对的位置，从此判断其胚珠为( )类型。

解析：A

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举一反三的答案和解析：

[单选题]1862年，京师同文馆设立。该馆先后开设外语、化学、物理、各国史略、航海测算、富国策、万国公法等课程。据此判断，同文馆

为洋务运动培养新式人才 D．旨在宣传“德先生”“赛先生”

[单选题]CPeople diet to look more attractive. Fish diet to avoid being beaten up, thrown out of their social group, and getting eaten as a result. That is the fascinating conclusion of the latest research into fish behavior. by a team of Australian scientists.

faces danger B． has breeding rights

[单选题]

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[单选题]ASocieties all over the world name places in similar ways. Quite often there is no official naming ceremony but places tend to be called names as points of reference by people. Then an organized body steps in and gives the place a name. Frequently it happens that a place has two names: One is named by the people and the other by the government. As in many areas, old habits died hard, and the place continues to be called by its unofficial name long after the meaning is lost.

many places tend to have more than one name