The northern parts of the United States get very cold in the winter. It snows a great deal and the temperature often goes (21) zero degree in January, (22) and March. But the northeastern and northcentral regions of (23) have been financial and industrial centers, and they are heavily polluted.
In recent years, people in these regions have begun to take vacations (24) these cold winter months. They go to southern parts of the country (25) it is warmer. Many go to Florida where the weather is (26) . Others go to the western states of Arizona, New Mexico and Texas where they (27) dry desert climates.
I has become (28) nowadays for old people to move south to these places (29) they retire. Typically these people sell their houses in their home communities and move south to begin a new life (30) senior citizens.
Their children likely have homes (31) and many of th
A. where
B. when
C. which
D. that
| Whether work should be placed among the
causes of happiness or among the causes of unhappiness may perhaps be regarded
as a doubtful question. There is certainly much work that is exceedingly weary
and an excess of work is always very painful. I think, however, that provided
work is not excessive in amount, even the dullest work is to most people less
painful than idleness. There are in work all grades, from mere relief of tedium
up to the profoundest delights, according to the nature of the work and the
abilities of the workers. Most of the work that most people have to do is net in itself interesting, but even such work has certain great advantages. To begin with, it fills a good many hours of the day without the need of deciding what one shall do. Most people, when they are left free to fill their own time according to the A. Work is very tiresome, especially when toe excessive. B. Work is a cause of the greatest delight of life. C. Work can at least give relief from boredom. D. Work can keep people busy as if they were poor. [填空题]严禁在轨道电路上拉临时线沟通电路造成( ),或盲目用提高轨道电路送电端电压的方法处理故障
[多选题]滚筒驱动的带式输送机装设有（ ）保护。
A.A.防滑、防跑偏、防堆煤、防撕裂 B.B输送带张紧力下降保护装置 C.C.温度、烟雾监测 D.D.自动洒水装置 [单项选择]真菌病的诊断主要靠临床表现和真菌学检查，其中以（）有决定价值
A. 病史 B. 临床表现 C. 皮损 D. 真菌直接镜检及培养 [单选题]关于输电线路施工区域布置不正确的是（）。
A.施工友情提示牌 B.施工现场风险管控公示牌 C.应急联络牌 D.施工平面布置图 [单选题]起重机械在载荷起吊时，应先将起吊物吊离地面（）米以下略作停留以进行试吊，确认吊挂良好后方准继续运行。
A.0.5 B.0.8 C.1 D.1.2 [判断题]P305T2M004 箱式变压器的不正常运行主要表现在温度和噪声上,其中温度异常升高对于干式变压器更为常见。( )
A.正确 B.错误 [判断题]在尖轨与基本轨空隙间装、卸螺栓时，要安放垫块，防止尖轨扳动挤伤手，作业后要及时将垫块取出。<《工务系统作业安全控制措施》>
A.正确 B.错误 [单选题]( )负责统筹协调网络安全工作和相关监督管理工作。( )
A.公安部门 B.工业和信息化部 C.通讯管理部门 D.国家网信部门 [单选题]下列关于正压式消防氧气呼吸器的表述中，错误的是( )。
A.佩戴时，要使呼吸器的重量落在臀部而不是肩部。 B.面罩连接好后，逆时针方向完全打开氧气瓶阀门，并回旋1/4圈，当听到报警器的瞬间鸣叫声时，表示瓶阀开启。 C.正压式消防氧气呼吸器按额定防护时间划分为60型、120型、180型、240型四种类型。 D.正压式消防氧气呼吸器按额定防护时间划分为60型、120型、180型三种类型。 我来回答: 提交
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