Life on land probably began about 430 million years ago, though it has existed in the water for perhaps much as 3 000 million years. When we think of the first life on land, we probably think of strange animals coming out of the oceans, but, in fact, no animals could have been living if plants had not been on land first. Plants had to be on land before animals arrived. They supplied the first land animals with the surrounding and food necessary, since the plants are the only form of life that is able to get and store energy.
The first plants to exist out of the water were probably certain kinds of algae (海藻) which were followed by other plants that grew close to the ground and needed water in which to reproduce. Once their move to land had been made, however, evolution (进化) took place quickly. By the end of 100 million years, plants had developed their roots (根), and some had got tree-like forms since height was very important in gaining sunlight. About 300 million years
A. Algae has existed for more than 430 million years.
B. It is impossible that algae might be the earliest plant on land.
C. Plants get food from animals in the oceans.
D. Evolution began after animals appeared on land.
| 女性，68岁，脑血管意外，经过抢救治疗，生命体征趋于平稳，但处于昏迷状态，护士交接班时发现病人骶尾部皮肤2 cm×3 cm呈紫红色，并有小水疱形成。 |
| Kevin Rogers used to be my boss.
At that time he was a hardworking, up-and-coming businessman and a real
slave-driver, always telling us we had to sell more and more. As soon as I
could, I got a job with another company. The last time I saw Rogers was more
than ten years ago. At least that’s what I thought until last Thursday. But now
I’m not so sure. I was on my way back to my office in the center of town. There is a small park nearby which I sometimes walk through after lunch. It was almost empty, except for an unshaven, shabby-looking man on one of the benches. He looked about fifty years old and was wearing an old, grey overcoat. It was a cold, wintry day, and he was shivering. "It’s been a long time since I had a meal. Can you help me" he said. There was something about his voice that sounded familiar. I gave him a A. begged some money from him B. tried to hit him C. offered to help him D. walked away from him [单选题]252、从S16荣潍高速的（___）收费站下高速，去往放茨小镇、华安水上世界、金宝乐园等景点较为方便。
A.A、坊子收费站 B.B、朱里收费站 C.C、潍坊收费站 D.D、潍坊东收费站 [单选题]男性，46岁，发作性心前区闷痛半月，劳累及情绪激动时易发，既往身体健康，体检：血压17.3／10.6kPa(130/80mmHg)，常规心电图示：大致正常
体格检查最可能发现的是
A.心脏扩大 B.肺底水泡者 C.心脏杂音 D.心律失常 E.心肺无异常 [判断题]消防电话总机应能呼叫任意一部电话分机,并能同时至少呼叫两部电话分机。( )
A.正确 B.错误 [判断题]所有职工必须掌握消防器材的使用方法。
[单选题]下列各项中，不能作为IP地址的是()。
A.159.226.1.18 B.202.96.0.1 C.202.110.7.12 D.112.256.23.8 [多选题]《中国铁路广州局集团有限公司关于启用广深港通勤专用中铁银通卡的通知》中规定使用广深港通勤专用中铁银通卡进站后因特殊情况需在原站出站，超过（ ）分钟系统将自动划扣一次上车站至香港西九龙往返费用。
A.10 B.20 C.30 D.60 [单选题]切割机护罩未到位时不得操作，不得将手放在距锯片（）mm以内。
A.120 B.150 C.110 D.100 [单项选择]以下哪项不属于口腔健康教育的原则（）
A. 思想性 B. 流行性 C. 群众性 D. 艺术性 E. 实用性 [多选题]83.应用特高频时间差法对放电源定位存在问题有（）。
A.放电起始峰的时间差测量只能靠目测，误差较大 $ B.$如果测量设备的硬件采样率比较低，会造成放电起始峰辨别的误差增大 $ C.$某些放电类型的起始峰不易被识别，进行精确的时间差定位比较困难 $ D.$只能将局部放电源确定在一小段范围之内，进一步确定放电源在腔体上具体所在处的方位较为困难 [多选题]作为一名国铁企业职工，我们应不断增强“四个意识”、坚定“四个自信”、做到“两个维护”。“四个意识”的内容是什么？
A.政治意识 B.大局意识 C.核心意识 D.看齐意识 [单选题]以下关于H20T红外相机测温功能的说法错误的是
A.在红外画面有效测温范围内，点击图像任意一点，即可获取该点的表面温度 B.在红外画面有效测温范围内，框选任意区域，即可获得指定区域的温度平均值、最高值与最低值 C.高增益模式：测温显示的温度范围比较小，测温范围为-40°C~550℃，画质相对较好 D.低增益模式：测温显示的温度范围较大，测温范围为-40°C~550°C，画质相对较低 [单项选择]患者，男，50岁，5小时前右上腹部挤压伤。查体：中上腹及背部压痛。尿检查正常。X线检查脊柱正常，膈下未见游离气体，腹膜后有少量积气。可能的诊断为
A. 胆道损伤 B. 十二指肠穿孔 C. 小肠损伤、穿孔 D. 胃挫伤 E. 横结肠损伤、穿孔 [单选题]电动工具应做到“一机一闸一保护”，()一个开关或一个插座接两台及以上电气设备或电动工具。
A.防止 B.严禁 C.允许 D.不宜 [单选题]下列说法正确的是( )
A.血压控制下来,就不用服药了 B.不能长时间服用某种降压药,不然就不管用了 C.降压药可以联合在一起用 D.吃药发生副作用就不能服用了 [多项选择]郑某涉嫌强奸罪，人民检察院依法对郑某提起公诉。根据刑事诉讼法相关规定，在案件审理过程中，下列做法正确的是：
A. 在案件审理过程中，人民法院发现案件需要补充侦查的，于是将案件退回人民检察院要求人民检察院进行补充侦查 B. 人民检察院发现案件需要补充侦查的，可以向人民法院提出建议，人民法院可以作出延期审理的决定 C. 如果人民法院认定证据不足，而作出证据不足、指控的犯罪不能成立的无罪判决，人民检察院有新的证据重新起诉的，人民法院依法不应当受理 D. 如果人民法院认定证据不足，而作出证据不足、指控的犯罪不能成立的无罪判决，人民检察院有新的证据重新起诉的，人民法院依法应当受理 [判断题]电费资金帐户的开设或变更是由电费管理部门按照帐户管理开设审批流程进行报批。
A.正确 B.错误 [单项选择]结晶法精制固体成分时
A. 溶剂对欲纯化的成分应热时溶解度大，冷时溶解度小 B. 溶剂对欲纯化的成分应热时溶解度小，冷时溶解度大 C. 溶剂对杂质应冷热都不溶 D. 溶剂对杂质应冷热都易溶 E. 趁热过滤后的母液应迅速降温 [多选题]自燃物质的火灾危险性主要表现在( )。(易)
A.遇空气自燃性 B.遇湿易燃易爆性 C.积热自燃性 D.挥发性 我来回答: 提交
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