下图表示不同浓度生长素对某植物茎生长的影响，下列叙述中错误的

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问题单项选择题

下图表示不同浓度生长素对某植物茎生长的影响，下列叙述中错误的是（）

A．P点对应的生长素浓度是该植物茎生长的最适浓度

B．当生长素浓度高于P时,茎生长仍被促进

C．曲线表明生长素的生理作用具有两重性

D．当生长素浓度高于M时,该植物的根生长开始受到抑制

答案

参考答案：D

填空题

单词拼写。

1. The campaign is a______ at increasing public awareness of the disease.

2. It's a simple dish to prepare, c________ mainly of fruits and vegetables.

3. His newly-published novel has gone to No.1 in the b____________ list.

4. The judge has come to the c_____________ that the suspect is innocent.

5. The software is m_______ to protect computers from being attacked by viruses.

6. Whoever is caught ___________(作弊) in the exam shall be severely punished.

7. Unfortunately, the gymnast had her legs __________(伤害) before the gymnastics competition.

8. The new technology will make great ___________(贡献) to the development of the IT industry.

9. Advertising companies are always coming up with new approaches to _______(推广) products.

10. The discovery of the new medicine is of great ___________ (意义) for people suffering from

heart problems.

单项选择题

《特种设备安全监察条例》第六十一条规定（）为特别重大事故。

A、特种设备事故造成30人以上死亡，或者100人以上重伤，或者1亿元以上直接经济损失的；

B、600兆瓦以上锅炉因安全故障中断运行240小时以上的；

C、起重机械整体倾覆的；

D、电梯轿厢滞留人员2小时以上的