填空题：水稻品种的“三性”是指水稻的____、____和____。

题型：完形填空

动词填空

阅读下面短文，用括号内所给动词的适当形式填空 (必要时可加情态动词或助动词)。

Afel was only a small boy when he first saw snow in a picture book. In the pictures he saw a lot of children 小题1:______ (play) in the snow.

Afel didn’t understand what snow was. But he dreamed about snow all the time. He dreamed of being able 小题2:______ (fly) across the snow.

One day when he was twelve, Afel小题3: ______ (watch) TV at his uncle’s house. The program was full of snow. Not only snow – there were people flying across the snow.

“Look! They 小题4: ______ (fly)!” he shouted excitedly.

The snow, and the people… It was just like one of his dreams.

“They’re skiing. It needs snow,” said his uncle, “it’s the Winter Olympics. It 小题5: ______ (hold) every four years.”

Afel 小题6:_________ （find）out that the next Winter Olympics would be in Sochi, Russia in 2014.

“Perfect,” he thought. “Enough time for me to become a good skier. I 小题7:______ (go) to the Winter Olympics, and win the gold medal for skiing.”

“But there’s no snow here!” people told him. “Where are you going to ski?”

Afel made himself a pair of skis and skied across the sand. At first he couldn’t move, but he practiced and practiced until he could move quite quickly.

“How will you go to the Winter Olympics?” people asked him. “Our country 小题8:______ (not, have) a team at all. Why 小题9:______ (not, do) athletics (田径) instead? We have lots of good runners. And we 小题10:______ (win) lots of medals at the Olympics.”

Now Afel is practicing skiing down sand dunes (沙丘). He dreams that the yellow sand and brown earth of the desert (沙漠) is the white snow.

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题型：单项选择题

治疗湿温病湿浊蒙蔽清窍所致窍闭神昏，应选用的最佳配伍是（）。

A.藿香、佩兰

B.苍术、厚朴

C.郁金、明矾

D.郁金、石菖蒲

E.牛黄、地龙

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题型：选择题

已知a²+b²=1，则2a+3b的最大值是（　　）