[单选题]卡诺制冷循环的制冷系数与( )有关 A.制冷剂的性质B.制冷剂的工作温度C.制冷剂的循环速率D.压缩机的功率
[单选题]在一个子网掩码为255.255.224.0的网络中,哪个是合法的网络地址（)A、150.150.0.0B、150.150.0.8C、150.150.8.0D、150.150.16.0
[判断题]PNP管放大电路中,UCC的极性为负,说明发射结反偏,集电结正偏.
[判断题]74LS181是四位串行加法器.( ).
[单选题]以下哪一项是一种路由选择协议 A、 OSPF B、 FTP C、 UDP D、 TCP/IP
[判断题]如果某一元件上的U和I的实际方向相同,电流从“+”端流入,则该元件是负载.
[单选题]污泥浓缩过程中去除的是( )A. 空隙水B. 水C. 水D. 内部水
[单选题]速度单闭环系统中,不能抑制( )的扰动.A 调节器放大倍数 B 电网电压波动 C 负载 D 测速机励磁电流
[填空题]恐怖性神经症所体验到的害怕的特点是
[填空题]检直细菌内毒素,《中国药典》采用什么方法
[问答题]简述婚姻无效的原因.
[阅读理解]Passage 1 It has been reported that in colleges across the United States, the daytime serial drama known as the soap opera has suddenly become in. Between the hours of 11 a.m. and 4:30 p.m, college television lounges are filled with soap opera fans who can.t wait to see the next episode in the lives of their favorite characters. Actually, soaps are more than a college favorite; they.re a youth favorite. When school is out, high-school students are in front of their TV sets. One young working woman admitted that she turned down a higher paying job rather than give up watching her favorite serials. During the 1960.s, it was uncommon for young people to watch soap operas. The mood of the sixties was very different from now. It was a time of seriousness, and talk was about social issues of great importance.Now, seriousness has been replaced by fun. Young people want to be happy. It may seem strange that they should turn to soap opera, which is known for showing trouble in people.s lives. But soap opera is enjoyment. Young people can identify with the soap opera character, who, like the college-age viewer, is looking for happy love, and probably not finding it. And soap opera gives young people a chance to feel close to people without having to bear any responsibility for their problems. 1. What is soap opera? ______A. Plays based on science fiction stories.B. Plays based on non-fiction stories.C. The daytime serial dramas on TV.D. Popular documentary films on TV.2. What can be the best title of the passage? ______A. College student viewers.B. Favorite TV serials.C. Soap opera fans.D. College-age viewers.3. Which is not the reason why the soap opera suddenly becomes in according to the passage? _______A. Because the viewers want to be happy and to enjoy themselves.B. Because the soap opera makes young people feel close to their people.C. Because the viewers can find themselves in the soap opera characters.D. Because the young people have to bear the responsibilities for their troubles.4.. What can we learn from the passage? ______A. College students like soap operas more than any other social groups.B. Young people of sixties liked soap operas more than people today.C. Young viewers have turned themselves from the seriousness of sixties to enjoyment now.D. The young as a whole are trying to look for happy love but in vain.5.. What message does the author want to convey to us? _____A. The people.s favor toward drama works has been changed for a long time.B. The people.s favor toward drama works changes along with the times.C. The people.s favor toward drama works is changed by the soap opera.D. The people.s favor has changed the drama works.
[单选题]组成脾白髓的结构有( ). A、 A: 脾索和淋巴小结 B、 B: 脾索和脾血窦 C、 C: 血窦和边缘窦 D、 D: 脾血窦和动脉周围淋巴鞘 E、 E: 动脉周围淋巴鞘和淋巴小结
[计算题]有一10m厚饱和粘土层,饱和重度为γsat=18.0kN/m3；其下为砂土,饱和重度为γsat=20.0kN/m3,其中有承压水,勘探得其承压水位距离地面3m.现要在粘土层中开挖基坑,试求基坑开挖的最大深度.(计算中取重力加速度g=10m/s2)
[判断题]Mass media performs three key functions: educating, shaping public relations, and advocating for a particular policy or point of view.
[单选题]STP计算的端口开销(Portcost)和端口带宽有一定关系,即带宽越大,开销越( ). A、 小 B、 大 C、 一致 D、 不一定
[判断题]用氨作还原剂,选择性非催化还原法脱硝的反应温度远高于选择性催化还原法脱硝的反应温度.
[问答题]求助者中心疗法认为,个体自我概念与经验间的关系可包括
[单选题]横向定位轴线之间的距离称为( ). A 跨度 B 柱距 C 柱网 D 距离
[单选题]为防止木结构腐蚀虫蛀,应采取的措施是( ) A.将木材干燥至20%以上的含水率B.木屋架山墙通风,设 老虎窗 C.刷油漆D.用防腐剂浸渍木材
[多选题]它的上升会使保本点上升的项目是( ).A、固定成本 B、单位售价 C、变动成本 D、销售量