当电缆直径小于或等于20mm时,弯曲半径应大于或等于电缆外径的()倍。
A.2
B.3
C.5
D.7
参考答案:C
根据句意及首字母,完成下列单词
1. Let's eat soon. I'm h______.
2. There is a supermarket b______ the post office and the school.
3. He studies hard to i______ his English.
4. Good b______ is half done, so I should work hard in the new school.
5. The bank is o______ twelve hours every day.
使用坐标$E$3引用工作表E列第3行的单元格,这称为对单元格坐标的()。
A、绝对引用
B、相对引用
C、混合引用
D、交叉引用