标志我国革命重心成功的从南方长江流域转移到西北黄河流域的重大事件是（）。
参考答案：红军会宁会师
----Jack, would you mind driving me to work tomorrow morning?
---- . My car is still being repaired in the garage.
A．No problem
B．Not at all
C．Yes, I would
D．Forget it
属于非接触式测温仪，与介质不接触，利用幅射原理测温的是（）
A.热电偶
B.热电阻
C.比色温度计
