TBA22使用的润滑油类型有（）.
A、460
B、630
C、320
参考答案：A, B
节约1度电能使1匹的空调器运行约（）h
A.1.5
B.2
C.2.5
D.3
She was the first one to receive such _____ honor. [ ]
A. a
B. /
C. an
D. the
