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Every year landslides cause 25 to 50 deaths and $2 billion in damage in the United States. And in December, a single event killed more than 2000 people in the Philippines. Sending workers to stabilize mountainsides using steel bars can help a lot, but it introduces new difficulties because of dust and loosen heavy, dangerous debris from the work. “It’s a quite dangerous job,” says Giorgio Pezzuto of D’ Appolonia, working with eight other companies. Now there may be an answer: a three-ton robot called Roboclimber. “The idea is to operate a machine far away that can do the stabilizing job without a human being near,”says Pezzuto, manager for the project, which is supported by a European organization. Engineers say that the machine will be faster and cheaper than manual labor. The robot, a large radio-controlled four-legged spider, has cost at least $2 million so far. It should be able to climb mountainsides, drill holes and insert steel bars there. Testing should begin in May. 小题1:The underlined word “event” refers to_____ A.earthquake B.debris C.dust D.landslide 小题2:The purpose in writing this text is _____ A.to tell people how serious the damage caused by landslides is B.to tell people that sending workers to stabilize mountainsides is a dangerous job C.to show people how to use a new robot D.to introduce a new robot that can be used to stabilize mountainsides 小题3:What does the robot look like? A.human being B.spider C.steel bar D.a drill 小题4:A landslides cause _____________in damage in the United States Every year . A.25 to 50 deaths B.more than 2000 people died C.$2 billion D.both A and C 小题5:The biggest advantage of this product is that____ A.it will be faster and cheaper than manual labor B.it can climb mountainsides, drill holes and insert steel bars there. C.it can do the stabilizing job without human beings near D.it is like a spider
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【单选题】一个复制的染色体中,两个染色质必须在(    )期间彼此分离。
A.
有丝分裂  
B.
减数分裂Ⅰ  
C.
减数分裂Ⅱ
D.
A与B    
E.
A与C
【单选题】一个复制的染色体中,两个染色质必须在( )期间彼此分离。 A. 有丝分裂 ; B .减数分裂 I 期; C .减数分裂 II 期; D . A 与 B ; E . A 与 C
A.
有丝分裂
B.
减数分裂 I 期
C.
减数分裂 II 期
D.
A 与 B
E.
A 与 C
【简答题】截干造林后,往往萌条长 2cm左右时,应除萌条,留( )个萌条,当萌条30cm左右时选留一株,同时培土。
【判断题】作业受到任务的低劣质量或不适宜的记忆信息的限制,即使分配较多的资源,也不能够改善其作业水平。这种过程属于材料限制过程。
A.
正确
B.
错误
【单选题】三七加工时剪下的芦头、支根、须根晒干后,其商品规格分别是()
A.
剪口、筋条、绒根
B.
筋条、剪口、绒根
C.
芦头、腿、须根
D.
根头、支根、须
【判断题】作业受到任务的低劣质量或不适宜的记忆信息的限制,即使分配较多的资源,也不能够改善其作业水平。这种过程属于材料限制过程。
A.
正确
B.
错误
【单选题】一个复制的染色体中,两个染色质必须在( E )期间彼此分离。 27 .以下关于酵母人工染色体( YAC )在细胞分裂过程中发生分离错误的描述,正确的是( D )。 A . 11 000bp 的 YAC 将产生 50% 的错误 B . 55 000bp 的 YAC 将产生 1.5% 的错误 C .长于 100 000bp 的 YAC 产生 0.3% 的错误 D .以上都对
A.
A .有丝分裂
B.
.减数分裂 I
C.
C .减数分裂 II
D.
D . A 与 B
E.
E . A 与 C
【判断题】气喇叭多用在具有空气制动装置的重型载重汽车上。
A.
正确
B.
错误
【单选题】一个复制的染色体中,两个染色质必须在( )期间彼此分离。
A.
有丝分裂
B.
减数分裂 I
C.
减数分裂 II
D.
A 与 B
E.
A 与 C
【简答题】联合发布《关于依法严厉打击黑恶势力违法犯罪的通告》是哪几个部门?
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