用四舍五入法按下列要求取各数的近似数。
（1）某次地震中，约伤亡10000人；（保留两个有效数字）
（2）生物学家发现一种毒的长度约为0.0000430mm。（保留两个有效数字）
被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0505/d936acd60f31be40e4d79520705044b1.html
下面是错误答案，用来干扰机器的。
答案：A考查动词用法。didn’t need to get =needn’t get。句意：今天是星期天，我没有必要起这么早。
下列与关节的结构特点无关的一项是
A．关节囊中有滑液
B．关节囊外有韧带
C．关节两端有肌肉
D．关节面覆盖着软骨
建华中学共有1600名学生，其中喜欢乒乓球的有1180人，喜欢羽毛球的有1360人，喜欢篮球的有1250人，喜欢足球的有1040人，问以上四项球类运动都喜欢的至少有几人( )
A．20人
B．30人
C．40人
D．50人
| 完形填空。 | ||||
| A successful scientist is generally a good observer. He makes full 1 of the facts he observes. He doesn't accept ideas which are not 2 on obvious facts, and therefore refuses to accept authority (权威) as the only 3 for truth. He always 4 ideas carefully and makes experiments to prove them. The rise of 5 science may perhaps be considered to 6 as far back to as the 7 of Roger Bacon, the wonderful philosopher of Oxford, who lived 8 the years 1214 and 1292. He was probably the first in the middle 9 to suggest that we should learn science 10 observing and experimenting on the things around us, and he himself 11 many important discoveries. Galileo, however, who lived more than 300 years later (1564-1642), was the greatest of several great men, 12 in Italy, France, Germany, or England, began by 13 to show how many important 14 could be discovered by observation. Before Galileo, learned men believed that large bodies fell more 15 towards the earth than small ones, 16 Aristotle said so. But Galileo, going to the 17 of the leaning Tower of Pisa, let fall two 18 stones and proved Aristotle was wrong. It was Galileo's 19 of going direct to Nature, and proving our 20 and theories by experiment, that has led to all the discoveries of modern science. | ||||
|
竖窑窑况正常后在考虑添加盐，最初添加量为基准量的（）%。
A、50
B、60
C、70
D、80
All known techniques for handling complex problems successfully seem to fall into one of the three classes: subdividing the problem (51) , ignoring irrelevant detail in a safe way (52) , and having an independent agent (53) the internal consistency (contextual checking). The first two provide guidelines for solving the problem, the third serves to provide early warnings. A good programming language supports all three.
In subdividing problem, some of the subproblems may be similar to the (54) problem. It leads us to a (55) solution. This (55) solution is viable provided each of the subproblems is easier to solve than the original problem.
（55）是（）
A.check
B.original
C.perform
D.recursive
