锅炉燃烧设备的惯性大,当负荷变化时,恢复气压的速度较快。
参考答案:错
一个角的度数是40°,那么它的补角的度数是[ ]
A.60°
B.140°
C.50°
D.90°
There _____ only three little dogs and a small cat in that small pet shop.[ ]
A. am
B. is
C. are
D. be