名词解释：长石

题型：连线题

请将下列结构与相应的功能用线连起来。

鸭梨的芽接到杜梨的枝条上嫁接

开花后结出了果实有性生殖

将植物的组织培养成新的植物体分裂生殖

细菌的繁殖组织培养

夏天在潮湿的地方有霉味孢子生殖

查看答案

题型：阅读理解

To discover whether bees can see colors, the following experiment is set up. A table is put in a garden and on the table is a piece of blue cardboard (硬纸板) with a drop of syrup (糖浆) on it. After a short time, bees come to the syrup. The bees then fly to their hive (蜂窝) and give the syrup to other bees in the hive. Then they return to the feeding-place which they have discovered. After a while, the blue cardboard with the syrup on it is taken away. Instead of this card, a blue card is now put on the left side of the first feeding-place and a red card to its right. These new card have no syrup on them. Thus, the blue card is on the left, the red card on the right, and there is nothing where the first blue feeding-card used to be. Very soon bees arrive again, and fly straight to the blue card. None to the red card.

小题1:To do the experiment, altogether how many cards do you need to prepare?

A．Two, one blue and one red.

B．Three, two blue and one red.

C．Three, one blue and two red.

D．Four, two blue and two red.小题2:If figure 1 (图1) below shows the table top during step 1 of the experiment, which picture in figure 2 represents (代表) step 2?

(blue card with syrup blue card red card )