<p>下列关于财务计算器功能键的说法中，错误的是（　）。A．右上方<img title="" alt="" src="https://file.gaojiufeng.cn/learnAppQuestion/cd/85/cd85386bad39e14cdc597dda2312f8f6.png" style="width: 100%;height: auto;">键，表示开关机B．按<img title="" alt="" src="https://file.gaojiufeng.cn/learnAppQuestion/92/79/92795a387afb397c1a43653b1fa73d31.png" style="width: 100%;height: auto;">和<img title="" alt="" src="https://file.gaojiufeng.cn/learnAppQuestion/25/94/25948ef89f04fc6ada1d78dcc5b6de2e.png" style="width: 100%;height: auto;">表示调用<img title="" alt="" src="https://file.gaojiufeng.cn/learnAppQuestion/ec/c5/ecc5b1695712e51ca6be3521bd9ca407.png" style="width: 100%;height: auto;">功能C．按<img title="" alt="" src="https://file.gaojiufeng.cn/learnAppQuestion/92/79/92795a387afb397c1a43653b1fa73d31.png" style="width: 100%;height: auto;">和<img title="" alt="" src="https://file.gaojiufeng.cn/learnAppQuestion/f0/6c/f06c37771ecfa72e20825886bedc8476.png" style="width: 100%;height: auto;">表示调用<img title="" alt="" src="https://file.gaojiufeng.cn/learnAppQuestion/8c/e8/8ce8e0bd6540555d1a6cb10c5b9a546f.png" style="width: 100%;height: auto;">功能D．<img title="" alt="" src="https://file.gaojiufeng.cn/learnAppQuestion/92/79/92795a387afb397c1a43653b1fa73d31.png" style="width: 100%;height: auto;">键是主键</p>