通过加手势能够克服心理障碍,专注讲话的哪一方面?()
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继电保护和安全自动装置的直流电源最低电压不低于额定电压的()。
A. 50%
B. 75%
C. 85%
D. 95%
液化气体的()必须严格控制,发现充装过量的气瓶,必须将超装的液体妥善排出。
A. 充装量
B. 充装压力
C. 充装容积
采用带电作业有哪些优点?在间接带电作业时,人身与带电体间的安全距离是多少?
Given the JSP code: and the Classic tag handler code: 5. public int doStartTag() throws JspException { 6. // insert code here 7. // return int 8. } Assume there are no other "foo" attributes in the web application. Which invocation on the pageContextobject,inserted at line 6,assigns "bar" to the variable x?()
A. String x = (String) pageContext.getAttribute("foo")
B. String x = (String) pageContext.getRequestScope("foo")
C. It is NOT possible to access the pageContext object from within doStartTag
D. String x = (String) pageContext.getRequest().getAttribute("foo")
E. String x = (String) pageContext.getAttribute("foo", PageContext.ANY_SCOPE)