各种食品保存方法的共同特点是（ ） A．杀死食品中的有害微生物 B．抑制微生物在

固体催化剂的比重通常可用（）来表示。

A、堆积比重

B、平铺比重

C、假比重

D、真比重

可判断为小康水平的Engel指数是（）

A.60%以上

B.50%～59%

C.40%～49%

D.30%～39%

E.30%以下

患者，女，52岁，5年前患乳腺癌手术治疗，术后化疗半年余。半年前发现在左锁骨上淋巴结肿大，2个月来出现胸闷、气短而就诊。化验检查：Hb109g/L， WBC6×10⁹/L，ESR 40mm/h，X线胸片显示右肺肿块阴影，心影向两侧扩大，心脏冲动减弱。

此时应采取的紧急措施是

A．大量利尿

B．应用血管扩张药

C．心包穿刺抽液

D．应用强心药

E．应用升压药物

Today I’d like to talk about how to become a (1) . Usually you have to start at the beginning. That is, you have to begin (2) of some sort on a local newspaper, a (3) , maybe on a small magazine -- work (4) . Now there aren’t that many organizations which have large numbers of foreign correspondents so you also have to (5) with that aim (6) . Another way of doing it is to work abroad, and work as (7) . That’s somebody who sells stories, and gets paid (8) , to newspapers and magazines and so on. And hoping to (9) that way, and eventually to be offered a (10) .
I don’t really know (11) are needed, but obviously a degree in modern languages or (12) would be very useful. But, a degree in itself probably wouldn’t (13) . It wouldn’t be enough to get you job. It wouldn’t (14) to make an editor decide to (15) . So it’s difficult to define the (16) . You’re going to need (17) and the ability to assimilate information (18) and then produce stories which (19) of the newspaper or radio or television station you (20) .

要获得当前驱动器，应使用驱动器列表框的______属性。

A．Path

B．Drive

C．Dir

D．Pattern