用树脂镜片做无框渐进眼镜时，开孔处的镜片厚度应为（）。
A. 1.2～2.0mm
B. 0.8～1.2mm
C. 1.5～2.0mm
D. 2.0～3.0mm
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Which of the following is a function of the XceL4 Cache？（）
A. It places frequently accessed data close to the processor to help deliver faster performance.
B. It replaces L3 cache memory.
C. It speeds up processor performance by purging the current set of instructions and freeing them up to work on the next set of instructions.
D. It allows the system to address more than 16GB of memory.
依据《电力安全工作规程（发电厂和变电站电气部分）》，高压试验结束后，试验人员应拆除自行装设的（），并检查被试设备，恢复试验前的状态。
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