[简答题]车辆在运行中或未停稳前，不允许进行（）操纵。-我要搜题网

First, the spotted owl was threatened by logging in the Pacific Northwest. Now it’s in danger from a new enemy, the barred owl. Barred owls have been moving to the Northwest from the eastern part of the United States. Stan Sovern has studied spotted owls. Now when he calls for spotted owls, barred owls are starting to appear. Sovern threw a mouse on the ground, and a barred owl grabbed it.
Scientists have learned that spotted owls start to vanish when barred owls come. Some barred and spotted owls have mated and produced hybrid babies. One spotted owl was killed by a barred owl.
Professor Ned K. Brown of the University of California-Berkeley says, "In some areas of Washington, the barred owls moved into very dense, deep woods. The same kind of woods that are opened up, or destroyed by logging, that adversely influences the spotted owls."
Ten years have passed since the federal government began protecting the spotted owl. Loggers were forced
A. in the northeastern United States
B. on seven million acres of public land
C. two decades ago
D. to save the barred owls

查看答案

[判断题]装设的接地线应接触良好、连接可靠。
A.正确
B.错误

查看答案

[单项选择]下列关于等产量曲线的特点描述错误的是( )。
A. 等产量曲线图上任意两条等产量曲线不能相交
B. 等产量曲线是一条从左上方向右下方倾斜的曲线，斜率为负值
C. 等产量曲线图中众多等产量曲线中，同一曲线上的各点代表相同的产量，不同曲线代表不同的生产要素值
D. 等产量曲线凸向原点，这是由边际技术替代率递减规律所决定的

查看答案

[单选题]《铁路客运运价规则》中规定，包用娱乐车、餐车时，应缴纳使用费每日每辆（）元
A.1000
B.2500
C.3000
D.5000

查看答案

[判断题]配电线路、设备停电时，对不能直接在地面操作的断路器（开关）、隔离开关（刀闸）的操作机构应加锁。
A.正确
B.错误

查看答案

[填空题] If you are a young college student, most of your concerns about your health and happiness in life are probably(S1)__________ on the present. Basically, you want to feel good physically, mentally, and(S2) _________ now. You probably don’’t spend much time worrying about the(S3)_________ future, such as whether you will develop heart disease, or (S4) ________, how you will take care of yourself in your (S5) ________ years, or how long you are going to live. Such thoughts may have (S6) _________ your mind once in a while, however, If you are in your thirties, forties, fifties, or older, such health related thoughts are likely to become (S7) _______important to you. (S8) ________ that will help you feel better physically and mentally. Recently researchers have found that, even in late adulthood, exercise, strength training with weights, and better food can help elderly individuals significantly improve their health and add happiness to their life. (S9) ________ giving us the opportunit

查看答案

[单项选择]旅游列车票价按相应的设备条件、普快和标记定员的（）核收。
A. 95%
B. 90%
C. 85%
D. 80%

查看答案

[简答题]车辆在运行中或未停稳前，不允许进行（）操纵。

热门试题: