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【简答题】
Travelling is a very good activity. When you get tired of your work or study, and when you are not busy, you can go to a beautiful place to enjoy the beauty of nature or other cities. You can take in fresh air, meet different people and make friends with them. It is good for your health to do so. But sometimes, travelling is not an enjoyable thing. For example, the weather can be changeable too often. You may catch a cold or be ill while travelling. The worst thing is some bad persons may steal your money. All these may happen to a tourist. When you go on a trip, you must get everything ready. Firstly, you must have clear information about the weather. Secondly, ask a friend to go with you so that you can help each other. Thirdly, you must be careful everywhere and try not to cause accidents. If you do this, you will surely enjoy our travel. The title of this article 小题1: 小题2: of travelling The activity is good. When you are tired of your work or study, and when you are 小题3: , you can go to a beautiful place to enjoy the beauty. You can also 小题4: fresh air, meet different people and make friends. Disadvantages of travelling But at 小题5: , travelling is an 小题6: thing. For example, the weather can often 小题7: . You may 小题8: a cold or get ill while travelling. The worst thing is the persons called thieves may steal your money. Other things about travelling Before going on a trip, you should prepare everything. Firstly, you must have 小题9: information about the weather. Secondly, ask a friend to go with you so 小题10: each of you can get help. Thirdly, you must be careful everywhere and try not to cause accidents.
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【单选题】下列检测细菌的生化反应中,用于检测靛基质的试验是
A.
甲基红试验
B.
尿素酶试验
C.
枸橼酸盐利用试验
D.
VP试验
E.
吲哚试验
【简答题】贫血程度的判定一般根据周围血红细胞数及血红蛋白量分为轻、____、____、____四度。
【单选题】下列监测细菌生化反应的试验中,用于检测靛基质试验的是
A.
甲基红试验
B.
尿素酶试验
C.
柠檬酸盐利用试验
D.
吲哚试验
E.
硫化氢试验
【单选题】下列检测细菌生化反应的试验中,用于检测靛基质试验的是 ?
A.
甲基红试验
B.
吲哚试验
C.
尿素酶试验
D.
枸橼酸盐利用试验
E.
VP试验
【单选题】017 “四大怀药”包括
A.
怀牛膝、地黄、山药、菊花
B.
怀牛膝、地黄、山药、红花
C.
怀牛膝、地黄、山药、芫花
D.
怀牛膝、地黄、山药、金银花
E.
怀牛膝、玄参、天花粉、菊花
【简答题】如图6-6所示,两个减压阀的调整压力分别为p j1 和p j2 当液压缸负载从F L =0到F L =F Lmax 变化时,对下列两种情况,判定液压缸大腔压力p L 决定于哪一个减压阀?为什么?另一减压阀处于什么状态?
【单选题】操作员面板的特点是( )
A.
一种廉价的单色操作面板,一般只显示几行数字、字母、符号和文字
B.
使用液晶显示器和薄膜按键面积大,直观性差
C.
是人机界面发展的主流方向,面积小,使用直观方便
D.
以上都不是
【简答题】如图所示,两减压阀调定压力分别为 p J1 和 p J2 ,随着负载压力的增加,请问图 (a) 和 (b) 两种连接方式中液压缸的左腔压力决定于哪个减压阀 ? 为什么 ? 另一个阀处于什么状态 ?
【单选题】如题33图所示 , 活塞运动时负载 F =1 . 2 kN, 活塞面积 A =12× , 溢流阀调定压力为 p y =4 MPa, 左右两个减压阀的调定压力分别为 p J 1=3 MPa 和 p J 2= 2 MPa, 则活塞运动期间 , A 、 B 、 C 三点的压力分别为 ▲ MPa.
A.
1 1 1
B.
1 2 1
C.
3 4 1
D.
3 4 2
【简答题】某技术方案各年的净现金流量如下图所示,试计算该方案财务净现值,并判断方案的可行性 ( i c = 10 % )
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