给下列词语注音 肿胀（ 　） 　叮嘱（ 　） 　花圃（ 　）

称重传感器的主要作用是什么？

乳牙萌出时期为（）

A.出生后6个月～2岁半

B.6岁左右

C.12岁左右

D.萌出后3～5年

E.萌出后1～2年

工程项目质量控制系统是面向工程项目而建立的质量控制系统，以下说法正确的是( )。

A．是用于建筑企业的技术管理

B．涉及工程项目实施中所有的质量责任主体

C．其控制目标是某一建筑企业的施工管理目标

D．其有效性需进行第三方认证

Beijing: The United States and North Korea had their first (1) in four months here this afternoon as part of the (2) negotiations on how to end North Korea’s nuclear program, but diplomats played clown prospects for (3) . The talks are at the Diaoyutai (4) , a sprawling, garden-filled (5) in western Beijing, with negotiators gathering around a giant hexagonal table built to (6) the six delegations. The Chinese placed the Americans and the North Koreans in (7) , which may have facilitated the (8) between Mr. Kelly and Mr. Kim, which took place (9) in the afternoon session. The two spoke for 30 minutes, two Asian diplomats (10) . The early indications of how the talks are going (11) . A South Korean who took part in the meetings described North Korea as "willing to (12) through dialogue." Chinese officials also put a (13) on the talks. "I heard talks this morning and this afternoon were very successful," the Foreign Minister, Li Zhaoxing, told delegates (14) . But Japanese and Russian participants were (15) . The Russian (16) , Aleksandr Losyukov, described the negotiations as (17) . "So far, the countries have put forward a number of (18) , which are (19) the development of these talks," he told Russian reporters in Beijing. "I would not say that I am feeling (20) ."

女性，16岁。右大腿下段肿痛2个月。夜间痛加剧，无畏寒发热。查体：右膝上方肿胀，皮温增高，局部皮肤表面静脉怒张，有压痛，膝关节屈伸受限。X线检查显示：右股骨下端溶骨性改变，有Codman三角。诊断应考虑（）。

A.软骨肉瘤

B.骨肉瘤

C.骨髓炎

D.骨巨细胞瘤

E.骨软骨瘤