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PowerShow.com is a leading presentation/slideshows( 展示与放映幻灯片 ) sharing website. Whether your application is business, how-to, education, medicine, school, sales, marketing, online training or just for fun, PowerShow.com is a great resource. And, best of all, most of its cool features are free and easy to use. You can use PowerShow.com to find and download sample PowerPoint presentations on just about any topic you can imagine, so you can learn how to improve your own slides and presentations for free. For a small fee you can get the industry’s best online privacy( 网络隐私 ) or publicly promote your presentations and slide shows with top rankings ( 排名 ). But aside from that, it’ s FREE. We’ll even change your presentations and slide shows into the Flash, including 2D and 3D effects, music or other audio. All for free. Most of the presentations and slideshows on PowerShow.com are free to view; many are even free to download. Check out PowerShow.com today — for FREE. There is truly something for everyone! 1. According to the first paragraph, PowerShow.com is a website which . A) offers advertising spaces B) provides training courses C) shares slideshows D) sells APPs 2. Most of PowerShow.com’ s features are . A) convenient to develop B) expensive to buy C) difficult to log in D) easy to use 3. By using PowerShow.com , you can learn to . A) make your presentations better B) create your personal website C) develop your own software D) conduct an online survey 4. If you want to get the industry’ s best online privacy, you need to . A) sign a contract B) pay a small fee C) ask for permission D) register a new account 5. Which of the following could be the title of the passage? A) Introduction to PowerShow Website B ) Developing Presentation Skills C) Setting up a Personal Website D) Future of PowerShow.com
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【单选题】已知:雨篷板海米宽对雨篷梁产生的扭矩设计值M=8.0kN.m。试问,雨篷梁的最大扭矩设计值MT(kN.m)与以下何项数值最为接近?提示:雨篷梁与框架柱刚接。
A.
17.0
B.
24.0
C.
28.8
D.
48.0
【单选题】四等水准,往返测照准标尺的的顺序为( )。
A.
后后前前
B.
后前前后
C.
前后后前
D.
前前后后
【单选题】本工程东入口雨篷的底标高为( )米
A.
2.700
B.
3.100
C.
4.200
D.
图中未明确
【单选题】良性前列腺增生需与前列腺癌鉴别时,可进行以下哪项检查( )
A.
发病年龄、排尿困难程度
B.
残余尿量
C.
有无血尿
D.
前列腺特异性抗原
E.
膀胱造影
【简答题】酯是重要的有机合成中间体,广泛应用于溶剂、增 塑剂、香料、黏合剂及印刷、纺织等工业。乙酸乙酯的实验室和工业制法常采用如下反应:CH 3 COOH + C 2 H 5 OH CH 3 COOC 2 H 5 + H 2 O 请根据要求回答下列问题: (1)欲提高乙酸的转化率,可采取的措施有: ____、____。 (2)若用上图所示装置来制备少量的乙酸乙酯,产率往往偏低,其原因为______、____...
【单选题】本工程雨篷顶标高为( )m
A.
2.850
B.
3.250
C.
3.300
D.
3.600
【判断题】雨篷底等构件的底面标高时,应标注建筑标高。
A.
正确
B.
错误
【单选题】趋势六 [ 证据 1] 4. (2018· 全国卷 III , 6) 某同学运用黑光灯诱捕的方法对农田中具有趋光性的昆虫进行调查。下列叙述错误的是 ( )
A.
趋光性昆虫是该农田生态系统的消费者
B.
黑光灯传递给趋光性昆虫的 信息属于化学信息
C.
黑光灯诱捕的方法可用于调查某种趋光性昆虫的种群密度
D.
黑光灯诱捕的方法可用于探究该农田趋光性昆虫的物种数目
【单选题】某同学运用黑光灯诱捕的方法对农田中具有趋光性的昆虫进行调查。下列叙述错误的是
A.
趋光性昆虫是该农田生态系统的消费者
B.
黑光灯传递给趋光性昆虫的信息属于化学信息
C.
黑光灯诱捕的方法可用于调查某种趋光性昆虫的种群密度
D.
黑光灯诱捕的方法可用于探究该农田趋光性昆虫的物种数目
【单选题】( 2018 ·全国卷III)某同学运用黑光灯诱捕的方法对农田中具有趋光性的昆虫进行调查。下列叙述错误的是 ( )
A.
趋光性昆虫是该农田生态系统的消费者
B.
黑光灯传递给趋光性昆虫的信息属于化学信息
C.
黑光灯诱捕的方法可用于调查某种趋光性昆虫的种群密度
D.
黑光灯诱捕的方法可用于探究该农田趋光性昆虫的物种数目
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