中国通过原始创新、集成创新和引进消化吸收再创新，取得了一系列重大技术创新成果，形成了

认真阅读文章，根据所给首字母完成下列单词，请注意各词拼写形式的完整。

     Last week Bruce wrote to Dick , telling him that he wasn't enjoying the n   1     school in Denver at

all . As all the o   2     students were from the same junior middle school , they get on  well with e    3    

other . Bruce tried his best to be friendly , but they didn't . I   4    , they made fun of (取笑) him , because he was the s    5     in the class . He had no idea about what to do . So Bruce n   6     some help from his

best friend , Dick . 

     Now , in his l   7    back to Bruce , Dick gave him two pieces of advice (建议):First of all , d   8    

worry about being short . And the s   9     , think about l   10     for a good friend .

^99mTc（V）-DMSA肿瘤显像出现阴性结果，最常见的恶性肿瘤是（）。

A.分化性甲状腺癌

B.头颈部原发性鳞状细胞癌

C.成骨肉瘤

D.甲状腺髓样癌

E.血管肉瘤

操纵子的调节基因缺失突变的结果是（）。

A.阻遏蛋白将继续合成

B.结构基因将不被转录

C.结构基因将持续转录

D.缺失诱导物

E.阻遏蛋白缩短

能够体现预防为主、防治结合的环境资源保护法原则的环境与资源保护法律制度有哪些？（）

A.奖励综合利用制度

B.限期治理制度

C.环境影响评价制度

D.“三同时”制度

E.排污许可证制度

逻辑表达式“a∧b∨c∧(b∨x＞0)”的后缀式为______。(其中∧、∨分别表示逻辑与、逻辑或，＞表示关系运算大于，对逻辑表达式进行短路求值)

A．abcbx0＞∨∧∧∨

B．ab∧c∨b∧x0＞V

C．ab∧cb∧x＞0∨∨

D．ab∧cbx0＞∨∧∨