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问题 选择题

将生长状况相同的某种植物的叶片分成4等份，在不同温度下分别暗处理th，再光照1h(光照强度相同)，测其重量变化，得到如下的数据。可以得出的结论是

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A．该植物光合作用的最适温度是27℃

B．该植物呼吸作用的最适温度是29℃

C．27-29℃的净光合速率相等

D．30℃下实际光合速率为2mg·h-1

答案

答案：B

填空题

阅读下面材料，在空白处填入适当的内容（1个单词）或括号内单词的正确形式。    

Chengdu has dozens of new millionaires, Asia’s biggest building, and fancy new hotels. But for tourists like me, pandas are its top（61）(attract).

So it was a great honour to be invited backstage at the not-for-profit Panda Base, where ticket money helps pay for research, I（62）（arrow）to get up close to these cute animals at the 600-acre centre. From tomorrow, I will be their UK ambassador. The title will be（63）(official) given to me at a ceremony in London.But my connection with pandas goes back （64）my days on a TV show in the mid-1980s,（65）I was the first Western TV reporter（66）(permit) to film a special unit caring for pandas rescued from starvation in the wild. My ambassadorial duties will include（67）(introduce) British visitors to the 120-plus pandas at Chengdu and others at a research in the misty mountains of Bifengxia.

On mu recent visit, I help a lively three-month-old twin that had been rejected by（68）(it) mother. The nursery team switches him every few（69）(day) with his sister so that while one is being bottle-fed,（70）other is with mum-she never suspects.

62（）
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单项选择题 共用题干题

一患者右下8765左下567缺失，左下8近中舌向倾斜不松动，余留牙完全正常

为了减小右下4所受的扭力，可选择（）。

A.延伸卡环

B.对半卡环

C.圈形卡环

D.RPI卡环

E.联合F环
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