简述干熄焦液位计冲洗的操作方法?
参考答案:
(1)打开疏水阀,放掉水位计中的水和汽;
(2)关闭水阀,吹洗汽阀;
(3)关洗汽阀,开水阀,吹洗水阀;
(4)关闭疏水阀,打开汽阀。
E-mail, which has been widely used in ________ recent years, is ________ good way of ________ communication
A.the, a, the
B./, a, the
C./, /, a
D./,a, /
足阳明胃经在胸部的腧穴距前正中线()。
A.0.5寸
B.1寸
C.2寸
D.4寸
E.6寸