检修后锅炉上水温度与汽包壁金属温度差应不大于()。
参考答案:20℃
Mr. Green living in China though he was born in London. [ ]
A. would like
B. wants
C. hates
D. enjoys
俄国人的口味特点是()。
A.口味浓重
B.喜欢辣味
C.口味清淡
D.咸中带甜