负压置换疗法,吸引器产生的负压不宜太大,一般不超过多少
A.16kPa
B.18kPa
C.20kPa
D.22kPa
E.24kPa
参考答案:E
I would like a job which pays more,but ________ I enjoy the work I'm doing at the moment.
A.in other words
B.on the other hand
C.for one thing
D.as a matter of fact
焦炉工人所患法定职业肿瘤为
A.膀胱癌B.皮肤癌C.白血病D.肺癌E.肾脏肿瘤