在进行B超检查前需多饮水,以保持膀胱充盈的是
A.肾B超
B.子宫B超
C.膀胱B超
D.前列腺B超
E.胆囊B超
参考答案:B,C,D
Entering the room, I found Mary _______ at the desk and _______ a letter.
A.seated; wrote
B.sitting; written
C.seating; writing
D.seated; writing
英特尔InBusiness(tm)生意通网络通信产品是针对()的。
A.大型企业
B.中小企业
C.电脑专卖店
D.科研机构