From the passage, we learn that there is a worldwide trend towards______
A.increasing the nutritional value of bread
B.increasing the consumption of protein
C.using bakery products as a source of carbohydrates
D.using grains, such as rice, as a source of carbohydrates
第5题
A.水位表或者安全阀全部失效
B.设置在汽空问的压力表全部失效
C.燃烧不正常
D.燃烧设备损坏、炉墙倒塌或者锅炉构架被烧红等严重威胁锅炉安全运行
为了保护您的账号安全,请在“上学吧”公众号进行验证,点击“官网服务”-“账号验证”后输入验证码“”完成验证,验证成功后方可继续查看答案!