问题
单项选择题
某种子站与某县农科所签订一份合同，双方约定，若农科所玉米良种培育成功，则以400元的价格卖给种子站2000克，则该合同( )。
A．属于买卖合同的预约，该预约已成立
B．属于买卖合同，该合同已成立但未生效
C．属于买卖合同，该合同于玉米良种培育成功时成立
D．属于买卖合同，该合同成立并生效
答案
参考答案：B
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某种子站与某县农科所签订一份合同，双方约定，若农科所玉米良种培育成功，则以400元的价格卖给种子站2000克，则该合同( )。
A．属于买卖合同的预约，该预约已成立
B．属于买卖合同，该合同已成立但未生效
C．属于买卖合同，该合同于玉米良种培育成功时成立
D．属于买卖合同，该合同成立并生效
参考答案：B
| 阅读理解。 |
| Bees live in little houses made of wood. Each house has a very small door for them to come in and out. We call their houses hives (蜂箱). When the flowers of plants in the fields begin to come out, the bees fly away very early in the morning to get the sweet juice (甜汁) of the flowers. A bee has a long tongue (舌头). It goes into the flower to suck up the juice. Then it carries the juice to the hive, and turns it into honey (蜜). When the bee flies out to look for flowers it may go to places very far, but it never loses its way. When the rain comes down, the bee will hide in some little hole in a wall or among the leaves of a tree. When the sun comes out again, it will fly home. Bees collect not only the juice but also the pollen (花粉) from inside the flowers. They carry the pollen home to make beebread for the young bees. |
| 1. We may guess the houses of the bees are like _____. |
[ ] |
| A. small buildings B. big bags C. balls D. boxes |
| 2. Bees come out to _____. |
[ ] |
| A. get the flower of plants B. get only the juice of the flowers C. get both the juice and the pollen D. look for their hives |
| 3. The bee gets the juice out of the flowers with its _____. |
[ ] |
| A. mouth B. tongue C. nose D. legs |
| 4. Which of the following sentences is true? |
[ ] |
| A. Although bees fly far away from their hives, they can find their way home. B. If the bee flies too far away, it can't find its home. C. Bees do their collecting work only in the fields near their hives. D. Bees must go very far to find the flowers. |
| 5. The word "beebread" means "_____". |
[ ] |
| A. food for bees B. bread for bees C. the living place of bees D. sweet juice |