负荷不变,循环水入口水温不变,循环水量增加,排汽温度()。
A、不变
B、升高
C、降低
参考答案:C
—I will buy you a new bike if you learn how to swim this summer.
—Is that a ________? I’m sure I’ll get the bike.
A.chance
B.promise
C.trick
D.treat
绝缘良好的绝缘垫属于基本安全用具。()