规定锅炉水位表最低安全水位线距最高火界距离是为了()。
A.防止汽水共腾;
B.保持锅炉正常水循环;
C.防止缺水,损坏受热面;
D.防止水击。
参考答案:C
His father came home at midnight, and _____,he was drunk.
A.as a result
B.that is to say
C.what’s more
D.sooner or later
上行性感染的肾盂肾炎病变最轻的部位是
A.肾小管
B.肾间质
C.肾盂粘膜
D.肾 * *
E.肾小球