| Weather changes when the temperature
and the amount of water in the atmosphere change. We can see and feel water
coming from the atmosphere when we have rain. But the water must somehow get
back to the atmosphere. Meteorologists call this the water cycle. There are many stages in the water cycle. Rain falls when water vapor in clouds condenses (凝结). Drops of water form and fall to the ground. The water soaks into the ground and feeds streams and rivers. A lot of rain falls into the sea. The heat of the sun evaporates some of the water in the ground and in the rivers, lakes, and the sea. It changes the liquid water into water vapor. The vapor rises onto the air. Water vapor is normally invisible. On a very damp of humid day, however, you can sometimes see water vapor rising from a puddle (水坑) or pond in a mist (薄雾) above the water. A. there is more water vapor in the air in the tropics than in cold polar regions B. there is more water vapor in the air in cold polar region than in the tropics C. it gets more rain in the tropics than in cold polar region because there are fewer vapors D. the amount of water vapor in the air depends on how often it rains [单选题]注射于真皮和肌内之间，注射剂量通常为1～2ml的注射途径是
A.静脉注射 B.脊椎腔注射 C.肌内注射 D.皮下注射 E.皮内注射 [判断题]年检时若发现司机室侧门橡胶止档有裂纹，但裂纹不影响其功能，则不需要进行更换 （5分）
A.正确 B.错误 [单项选择]关于SLE遗传基因的叙述，错误的说法是（）。
A. SLE是单基因疾病 B. 特定的自身抗体常与SLE的临床亚型有关 C. 基因间在某种环境下相互作用，改变了正常免疫耐受性而致病 D. HLA的补体基因与SLE的发病相关 E. HLA-Ⅱ类基因位点所共有的特定序列与SLE病人中许多自身抗体的产生有关 [判断题]22.积分时间愈长，积分作用愈弱.()
A.正确 B.错误 [单项选择]变电所二次设备的维护周期为（）
A. 一个月 B. 二个月 C. 半年 [单项选择]建设工程投资具有投资数额巨大、投资差异明显、( )等特点。
A. 投资控制必须委托监理 B. 投资对每项工程必须分别采用不同定额 C. 需动态跟踪调整 D. 投资控制包括索赔计算 [单项选择]在事故停车时所需关闭的阀门中，操作错误的是（）
A. 循环泵进出口阀 B. 碳四进料泵进料阀门 C. 甲醇进料泵进料阀门 D. 再沸器蒸汽管线上阀门 [单选题]660设备的XSJ2盘支持tunnel配置QoS条目数为：（）
A.1021 B.1022 C.1023 D.1024 [单选题]由基尔霍夫第一定律可知:对于任何节点,流入的净电流为( )。
A.正数 B.负数 C.零 D.不确定的数 [单选题]人员录用效用的计算公式为()
A.人员录用效用=录用人数/招聘总成本 B.人员录用效用=应聘人数/招募期间的费用 C.人员录用效用=被选中人数/选拔期间的费用 D.人员录用效用=正式录用的人数／录用期间的费用 我来回答: 提交
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