两台链板机搭接运输时，搭接长度不小于多少？

阅读理解。

     The doctor handed me my medicine and said sorry to me because his register (收银机) had already

closed. He asked if I would mind using the register at the front of the store. I told him not to worry and

walked up front. One person was in line ahead of me, a little girl no more than seven with a bottle of medicine

on the counter (柜台). She held a little green and white coin purse closely to her chest (胸口).

     The purse reminded me of the days when, as a child, I liked dressing myself up in my grandma's clothes.

One day, wearing her large clothes and hat, I went out to buy something. I gave a fake (假的) dollar to the

shop owner, but he handed back some real coins for my purse."Keep the change!" he told me with a smile.

     Now, with both hands shaking, the little girl pulled out a dollar bill and some coins for her medicine. As

she tried to count her money, I could see right away that she was about a dollar short. Quickly, I put a dollar

bill onto the counter. The child collected her change into her coin purse and ran out.

     As I walked to my car, I felt a tug (用力拉) on my shirt. There was the girl, looking up at me with her

big brown eyes. She gave me a smile, and put out her little hand. It was full of coins. "Thank you," she said.

     "That's OK," I answered, smiling. "Just keep the change!"

1. The doctor said sorry to the writer because ________.

A. his register had broken down

B. his register had closed

C. he was busy

D. he had used up his medicine

2. Which of the following statements about the little girl is Not true according to the passage?

A. She was careful.

B. She didn't have enough money for the medicine.

C. She was kind.

D. She returned the dollar to the writer.

3. The writer helped the girl because ________.

A. the girl had no money

B. the girl wanted to use some fake money

C. the girl made the writer think of her own childhood

D. the writer was very rich

4. What does the underlined word "short" mean?

A. 矮的

B. 短的

C. 不足的

D. 短缺的

5. The writer told the girl to keep the change because ________.

A. the writer didn't need it

B. the writer wanted to pass on love

C. the writer was in a hurry

D. the writer didn't like coins

“bedside table”中文意思的是（）。

A.床头柜

B.洗衣袋

C.针线包

D.空调

赵某经营造纸厂，为偷排废物不被发现，侵入环境质量监测系统干扰环境质量监测系统排污口的采样设备，致使监测数据严重失真。赵某构成（）。

A.污染环境罪

B.破坏计算机信息系统罪

C.污染环境罪与破坏计算机信息系统罪，应当数罪并罚

D.非法经营罪

日本某修造船厂发生一起火灾事故。该厂修船船坞几天前有一艘外国船籍的油船(约 9万吨)人坞，更换侧罐的外板和中央罐的船底外板。
事故发生当天，准备更换其中的左弦3号侧罐(长约40m、宽约10m、高约20m)的外板。上午在罐内装配脚手架，然后由10个人开始对罐内施工部分进行清扫，把堆积在外板更换部分的休息室上的残泥用锹、钩刮铲装在容器里，吊到船底。
下午在清扫的同时，又有6人开始外板打眼和切割，用气焊在外板上开大致等间隔的换气孔，同时进行休息室和外板接头的切割，气体(乙炔和氧气)是从甲板上的气体转撤器通过软管输入的。作业时已预先在罐底灌上水，并且是在除完泥渣的地方进行的。
但是开始打眼和切割约1h后，油罐内发生火灾，从事该项作业的6人和清除泥渣的1人向油罐外躲避，其中6人行动较慢，在升降梯等处被烧死或吸入一氧化碳中毒死亡。
经调查分析，事故原因如下：
油罐上部气割或切割的火星引着下部休息室残留的泥渣，又引起其他处残留的泥渣燃烧。罐底的水量少，刮落的泥渣没有完全被水盖住，从而引燃船底泥渣，这也是使火灾扩大的原因。
该造船厂每天定时测定作业场所可燃气体浓度及氧气浓度，根据测定结果的规定场所标明是否可以进行烟火作业，对该船3号侧罐内的作业，清扫组和焊接组之间预先也商议了计划。明火作业时，对有无形成爆炸性混合气体充分注意到了，但对泥渣这一可燃性物质，对它的易燃程度、应除去的量、残存泥渣的分布状态和使用明火场所的相互位置关系等则没有从安全角度出发给予足够的考虑。油罐维修作业中，泥渣的存在不论在安全方面还是在劳动卫生方面，都是应经常充分考虑的事项。像这种气割火花引起泥渣着火，初期灭火失败导致火灾的事例时有发生。这类事故有时是发生在油罐内，因此不易躲避，换气也困难，往往造成重大人身事故，为了作业安全，必须事前进行慎重的研究。
这次事故存在的问题是：
(1)罐底部盛水不足；
(2)消防水管虽然拉进罐内，但负责使用的人着火时不在场，未能有效地利用；
(3)带进罐内的灭火器不够用。
为了防止同类事故的发生，须采取的措施是：
(1)明确清除泥渣的判断标准和确立按该标准建立的现场检查体制；
(2)规定相应的烟火作业限制(包括禁止)；
(3)调整作业间的联系；
(4)推行以作业指挥人员为中心的安全作业；
(5)确保避难通路、避难口通畅和按需要设置、装备报警器；
(6)配备一定数量合适的消防设备和掌握使用方法。
根据以上内容回答下列问题。

为了使采集的耕作层土壤混合样品有代表性，采样点深度要求（）cm

A.15---20

B.15---30

C.30---40

D.40---50