给水泵的任务是将除过氧的饱和水,提升至一定()后,连续不断地向()供水,并随时适应锅炉对给水量的变化。
参考答案:压力、锅炉
A new report ____ on Monday by the Census Bureau ____ a sophisticated method to measure poverty rates has found that 46.6 million Americans are living in poverty.
A.released;used
B.releasing;used
C.released;using
D.releasing;using
The Smith’s family, which __________ a large one, ____________visit BeiJing this summer.
A.are, are going to
B.is, are going to
C.is, is going to
D.are, is going to