设参数方程,确定了y是x的函数,且f′(t)存在,f(0)=2,f′(0)=2,则当t=0时,dy/dx的值等于:()
A.4/3
B.-4/3
C.-2
D.2
参考答案:D
—Could you please tell me ________?
—Sure. It's very easy. [ ]
A. where can I buy this kind of camera
B. who bought the camera
C. if there is a camera shop over there
D. how I can use the new camera
在“报表设计器”中,要添加标题或其他说明文字,应使用______控件。