is invented被发明,一般现在时被动语态;C. invented发明,过去式或者过去分词;D. was invented被发明,一般过去时被动语态。根据句意可知,1-9数字系统首先被印度人发明,所以本句要用被动语态,被动语态的结构为:be+动词的过去分词,首先排除A和C;根据常识可知,1-9数字系统的发明发生在过去,所以本句要用一般过去时,一般...
这么考根据最后一段中的“It can benefit adults as well. For thosenot into gaming, there is ‘Lego Art'. .. create pop art ‘posters'.. . 可知,成年人也可以玩这些乐高积木,他们可以拼出一些艺术作品,创造流行的艺术“海报”。故正确答案为B。 结果四 题目 CInvented by French teenager Louis ...
C. Discouraged by its complex structure.D. Shocked for her own lack of hand skills.39. According to Smith, the reconstruction work is done mainly to ___.A. restore old workshops B. understand the craftsmen C. improve visual effects D. inspire the philosophers 40. Why does the author ment...
If parameters in old-style functions were declared usingtypedefnames, such asoff_tandino_t, it is important to know whether or not thetypedefname designates a type that is affected by the default argument promotions. For these two,off_tis along, so it is appropriate to use in a function pr...
The order of these translation phases is specified by ISO C. Every trigraph sequence in the source file is replaced. ISO C has exactly nine trigraph sequences that were invented solely as a concession to deficient character sets, and are three-character sequences that name a character not in...
1( ) The zipper by Whitcomb Judson in 1893.A. inventsB. inventedC. is inventedD. was invented 2( ) The zipper by Whitcomb Judson in 1893.A. inventsB. inventedC. is inventedD. was invented 3【题目】33. The zipperby Whitcomb Judson in 1893. A.inventsB. inventedC. is inventedD....
Let's take a look at how paper is made. First, of course, the trees are cut down. The logs(原木)are carried by truck to a pulp(纸浆)factory. The skin is cut off from the logs. Then logs are moved into ...
Despite the widespread use of anilines, synthetic challenges to these targets still exist. Selectivity is often an issue, when using the traditional nitration-reduction sequence or more modern approaches, including arene C–H aminations catalyzed by tran
You can have wild and crazy thoughts. Remember that no idea is too silly. Many people laughed at the Wright brothers and said they would never fly. But they weren't discouraged by what people said. That's why now we have planes. ...
要用被动语态 “be + 过去分词” 形式,A 选项 “invents” 是主动语态一般现在时,B 选项 “invented” 是主动语态一般过去时,都不符合,可排除;根据时间状语 “in 1958” 可知,句子时态为一般过去时,C 选项 “is invented” 是一般现在时的被动语态,不正确;D 选项 “was invented” 是一般过去时的被动语态,...