[判断题]当值班员能够确认列车已到压上进站信号机内方的轨道电路时，必须在履行登记的情况后按压特设的带铅封的坡道解锁按钮代替限时解锁。
A.正确
B.错误

High school and college students in the United States today, as well as others who plan to work in this country, have one important question about their futures: Will they find a job There’s no easy answer, of course. But let’s look at some of the recent changes in the U.S. job market and see if we can make some predictions for future job hunters.
A. good way to begin is to look at the American work force and how it’s changing. Clearly, the most important change has been the shift from a manufacturing economy to a service economy. Let’s define both of these terms. First, a service economy is one in which most workers provide services--that is they do something instead of making something. They don’t produce a specific product; they serve customers or clients, like your doctor does, or your hair stylist, or airline pilots, salesclerks, etc. Now, in contrast, people who actually produce things -- like cars, furniture or clothing--are part of t