负有安全生产监督管理职责的部门对检查中发现的隐患，有权责令生产经营单位立即采取措施予

广东与中南美的纬度、气候条件相近，又没有当地的天敌，非常适合它们生存、繁殖。结合背景材料分析防止外来物种的入侵可能采取的方法（  ）

①改变广东的气候条件，引入天敌

②加强检验检疫，尤其是进口动植物

③保护好环境，避免生态的破坏

④拒绝与中南美洲国家的贸易往来

A．①②

B．②③

C．①③

D．②④

The effect of the baby boom on the schools helped to make possible a shift in thinking about the role of public education in the 1920’s. In the 1920’s, but especially (1) the Depression of the 1930’s, the United States experienced a (2) birth rate. Then with the prosperity (3) on by the Second World War and the economic boom that followed it, young people married and (4) households earlier and began to (5) larger families than had their (6) during the Depression. Birth rates rose to 102 per thousand in 1946, 106.2 in 1950, and 118 in 1955. (7) economics was probably the most important (8) , it is not the only explanation for the baby boom. The increased value placed (9) the idea of the family also helps to (10) this rise in birth rates. The baby boomers began streaming (11) the first grade by the mid-1940’s and became a (12) by 1950. The public school system suddenly found itself (13) The wartime economy meant that few new schools were buih between 1940 and 1945. (14) , large numbers of teachers left their profession during that period for better-paying jobs elsewhere.

(15) , in the 1950’s, the baby boom hit an antiquated and inadequate school system. Consequently, the custodial rhetoric of the 1930’s no longer made (16) ; keeping youths ages sixteen and older out of the labor market by keeping them in school could no longer be a high (17) for an institution unable to find space and staff to teach younger children. With the baby boom, the focus of educators (18) turned toward the lower grades and back to basic academic skills and (19) . The system no longer had much (20) in offering nontraditional, new, and extra services to older youths.

18（）

A.refutably

B.indispensably

C.inevitably

D.respectively

皮袄pí ǎo

【背景资料】某单位一栋旧办公楼装修，具备照明系统安装条件，可进场进行照明系统安装。

请根据背景资料完成相应小题选项，选项类型根据各小题注明要求，把所选项在答题卡相应题号中填涂，在题本上答题无效！其中，判断题二选一（A.B选项），单选题四选一（A.B.C.D选项），多选题四选二或三（A.B.C.D选项）；不选、多选、少选、错选均不得分。

照明线路导线敷设后，应用500V兆欧表测量每个回路导线对地的绝缘电阻，该绝缘电阻值不应小于（）MΩ。

A、2

B、5

C、10

D、20

女，46岁，乙肝表面抗原阳性，USG发现肝内11cm×13cm大小的肿块，CT增强扫描动脉期病灶边缘出现不规则高强化，静脉期图像显示病灶明显缩小，中心可见裂隙样低密度区。

CT拟诊为

A．巨块型肝癌

B．巨大海绵状血管瘤

C．巨大肝腺瘤

D．巨大FNH

E．巨大肝肉瘤