[单选题]在高压室内的二次接线和照明回路工作,需将高压设备停电或做安全措施时应使用()。
A.第一种工作票
B.第二种工作票
C.口头指令

Passage 4 When a Scottish research team startled the world by revealing 3 months ago that it had cloned an adult sheep, President Clinton moved swiftly. Declaring that he was opposed to using this unusual animal husbandry technique to clone humans, he ordered that federal funds not be used for such an experiment -- although no one had proposed to do so -- and asked an independent panel of experts chaired by Princeton President Harold Shapiro to report back to the White House in 90 days with recommendations for a national policy on human cloning. That group -- the National Bioethies Advisory Commission (NBAC) -- has been working feverishly to put its wisdom on paper, and at a meeting on 17 May, members agreed on a near - final draft of their recommendations. NBAC will ask that Clinton’s 90 - day ban on federal funds for human cloning be extended indefinitely, and possibly that it be made law. But NBAC members are planning to word the recommendation narrowly to avoid n
A. federal funds have been used in a project to clone humans
B. the White House responded strongly to the news of cloning
C. NBAC was authorized to control the misuse of cloning technique
D. the White House has got the panel's recommendations on cloning

In some early attempts by psychologists to describe the basic learning process, the terms ’stimulus’, ’response’ and ’reinforcement’ were introduced. In an educational setting, these (1) could be defined as follows. When a teacher gives an (2) , or sets a problem, or asks a question, the pupil (3) in some way, and the teacher then tells the pupil if he has responded correctly. The teacher’s first action is called the (4) . The pupil’s action, carrying out the instruction, or solving the problem, or answering the question, is (5) the response. When the teacher tells the pupil his response is (6) , the bond between the stimulus and the response is strengthened and reinforcement is positive. If the response is incorrect, the bond is weakened, and reinforcement is (7)
Some psychologists laid great (8) on the importance of reinforcement for continued learning. They (9)
A. false
B. correct
C. artificial
D. true