C++语言中表示双精度浮点数的关键字是【 】。
参考答案：double
解析：C++语言中基本的数据类型关键字，有int，float，double。
—________
—He's old with white hair. [ ]
A. What is he?
B. Who is he?
C. What do he look like?
D. What does he look like?
UPS装置的运行中的检查项目有哪些？
