白细胞 | /r/n 支气管扩张 | /r/n 病毒性呼吸道感染 | /r/n 合计 | /r/n
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+ | /r/n 3 | /r/n 5 | /r/n 8 | /r/n
++ | /r/n A. 配对设计 B. 完全随机设计 C. 自身对照设计 D. 配伍组设计 E. 历史对照设计 [判断题]所谓“言外行为”，即交际主体说话或写字的行为，它传送话语的语言意义。
[单项选择]Passage 2
The top of the world is a wonderland. In winter, the temperature often falls to -30°F and the sun never rises. The ocean is surrounded by frozen ground. There are few people or trees, but to polar bears, the Arctic(北极)is home.
(78) Polar bears have thick fur, big paws and other features that make them well prepared for life in their tough environment. In fact, they need the Arctic sea ice for survival. But climate change is causing larger and larger areas of summer sea ice to melt(融化). Experts say that if warming patterns continue, the Arctic could be free of summer sea ice by 2050. That may cause two-thirds of the world’s 20,000 polar bears to be gone by then too.
Polar bears can’t survive for long on land. Seals are their main source of food. The only place where polar bears can hunt seals is on the ice. (79) Although these bears are strong swimmers, they are no match for lightning swift seals in the water. A polar bear has brilliantly clever strategies to overcom
A. Saving energy. B. Conducting scientific research. C. Seeking international cooperation. D. Saving polar bears and their home. [简答题]石灰、粉煤灰稳定砂砾基层养护应符合哪些规定?
[多项选择]公路工程进度计划的检查结果可以通过( )体现和分析。
A. 横道图法 B. 斜条图法 C. 网络计划法 D. S曲线 E. 垂直图 [简答题]出租车司机的礼仪有哪些要求？
[单选题] 不影响各级电网通信业务的竣工延期时间不得超过（）小时；
A.2 B.4 C.6 D.8 [多选题]今日头条广告产品优势有哪些？
A.行业领先的个性化机器推荐算法 B.海量样本数据，精细化管理 C.千人千面深度分析用户兴趣偏好 D.行业内第一家广告全面支持检测 [判断题]哈登完善的能量意外释放理论认为在一定条件下，某种形式的能量能否产生造成人员伤亡事故的伤害取决于能量大小，与接触能量时间长短和频率以及力的集中程度无关。
A.正确 B.错误 [单选题]A-D-A-013 5 2 3
正线普通线路年通过总重小于8Mt，道床顶面宽度( )m。 A.2.9 B.3.0 C.3.1 D.3.4 [填空题]在语法一翻译法的课堂里，语法是以______的途径教授的，即讲授语法规则，然后用例子加以说明和解释。而在直接法的课堂里，语法是以______的途径去教授的，即让学生先实际掌握语言材料，再从他们所积累的感性语言材料中总结出语法规则，教师不在学生接触语言材料之前去讲授任何语法规则。
[单选题]关于流入性增强效应的叙述,正确的是
A.出现在自旋回波中 B.出现在梯度回波中 C.是预饱和技术应用的结果 D.出现在快速自旋回波中 E.运用此效应要求扫描层面平行于扫描血管 我来回答: 提交
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