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阅读理解。 At the beach Ben: Hi, Judy! I can't believe you came to join us! Judy: Hello, Ben. I came because I like your idea: when you give, you're rich. I'm happy that I can do something for the Earth. Ben: Right. That's why we had this plan to get our clean beach back. Do you know if Paul's coming? I remember he had the same idea and said he would try his best to come over. Judy: But he just called and said he wouldn't come today because it's too hot. Ben: I can't believe it! He always says, 'We can do this and that….' Judy: Don't you know him? He only pays lip service to what should be done but seldom does anything. Ben: I see. Let's forget about him. We'll have Tony and Sophie to help us soon. Judy: That's great. So where should we start now? Should we pick up those bottles first? Ben: Sure, let's go. 1. Why are Ben and Judy at the beach? A. To go swimming. B. To clean up the beach. C. To have a beach party. D. To learn about sea animals. 2. What does Judy mean by saying Paul pays lip service? A. He enjoys eating. B. He is good at singing. C. He talks a lot but does little. D. He kisses people to show his thanks. 3. Which is true? A. Paul comes to the beach in the end. B. Judy feels bad about going to the beach. C. Ben is surprised to see Judy at the beach. D. Tony and Sophie will not come to the beach.
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【简答题】如图所示,用泵将水从贮槽送至敞口高位槽,两槽液面均恒定不变,输送管路尺寸为83×3.5mm,泵的进出口管道上分别安装有真空表和压力表,真空表安装位置离贮槽的水面高度H1为4.8m,压力表安装位置离贮槽的水面高度H2为5m。当输水量为36m3/h时,进水管道全部阻力损失为1.96J/kg,出水管道全部阻力损失为4.9J/kg,压力表读数为2.452×105Pa,泵的效率为70%,水的密度为1000k...
【简答题】等温等压下进行的化学反应,其方向由∆ r H m 和∆ r S m 共同决定,自发进行的反应应满足下列哪个关系式:____ ____ ∆ r S m = ∆ r H m /T; ____ ∆ r S m > ∆ r H m /T; ____ ∆ r S m ≥ ∆ r H m /T;____ ∆ r S m ≤ ∆ r H m /T 注:等温等压下自发过程,ΔG =ΔH-TΔS < 0
【单选题】以下关于社区工作者素质要求的说法,错误的是( )
A.
社区工作的价值观是社区工作者必备的素质要求，要想成为一名合格的社区工作者就需要始终坚持社区工作的专业价值观。
B.
社会工作者只需要掌握社会工作的发展历史、功能、哲学基础与价值体系、基础理论、工作方法等方面的内容就可以了。
C.
社区工作者必须要掌握较为全面的技能，包括组织协调能力、人际交往能力、表达能力、社会政策分析能力、综合社区服务能力等。
D.
社区工作者的知识结构必须以广见长，要掌握各类相关知识。
【单选题】产品出厂检验时,发现出厂检验项目水分不合格,应采取的措施是( )
A.
签发不合格报告，产品不得出厂
B.
对产品进行重新加工处理，至合格后再出厂
C.
重新进行抽样，对水分进行检验
D.
按领导说的办
【单选题】下面哪种逻辑运算表达式检索结果最少（ ）。
A.
a and b and c
B.
(a or b ) and c
C.
a or b or c
D.
a and (b or c)
【简答题】1 、 用一台离心泵将密度为 1100
kg/m 3 的水溶液从敞口贮槽中送往表压强为 300kPa 的塔中,溶液管出口至贮槽液面间的垂直距离为 20m , 送液量为 30m 3 /h ,管路为 Ф68×4mm 钢管,直管长度及局部阻力当量长度总计为 140m , 管路的摩擦系数 λ 为 0.022 ,离心泵的效率为 60 %,求泵的 轴功率。 2 、 如图所示,有黏度为 1.7mPa.s 、密度...
【单选题】某系统从状态A经不可逆过程到状态B,再经可逆过程回到状态A,则系统的ΔG和ΔS满足下列关系中的哪一个( )。
A.
ΔG>0,ΔS>0
B.
ΔG=0,ΔS=0
C.
ΔG>0,ΔS=0
D.
ΔG<0,ΔS<0
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