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【单选题】
Computers Before the widespread use of computers, managers could not(51)full use of large amounts of valuable information about a company's activities. The information either(52)managers too late or was too expensive to be used. Today, managers are facing a wide(53)of data processing and information instruments. Managers can draw on computer-based information systems to control(54)in every area of their company. On any kinds of performance measures, the information provided by these systems helps managers compare standards(55)actual results, find problems, and take proper action(56)it is too late to make changes. The(57)of computerized (电脑化) information systems has sharply changed management control in many companies. Even a neighborhood shopkeeper may now use computers to(58)sales, billing, and other activities. Now, there are about 24 million microcomputers in(59)in the United States m one for every 10 citizens. It is(60)that by 1996, 61 percent of American managers will be using some sort of electronic work station. In order for managers to be sure that the computer-based information they are receiving is(61), they need to understand how computers work. However, in most(62)they do not need to learn how to program computers. Rather, managers should understand how computerized information systems work; how they are(63), their limitations and costs; and the manner in which information systems may be used.(64)an understanding is not difficult to achieve. One research found that business firms were more successful in teaching(65)information about computers to business graduates than they were in teaching business subjects to computer science graduates.
A.
take
B.
have
C.
make
D.
get
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【简答题】java 中会存在内存泄漏吗,请简单描述。
【单选题】洋地黄毒苷元属于
A.
丙型强心苷元
B.
乙型强心苷元
C.
甲型强心苷元
D.
壬型强心苷元
【单选题】属于甲型强心苷元的是( )
A.
羟基洋地黄毒苷元
B.
绿海葱苷元
C.
紫花洋地黄苷A
D.
真地吉他林
E.
绿海葱苷
【判断题】引导接车时,列车以不超过15km/h速度进站,并做好随时停车的准备。
A.
正确
B.
错误
【单选题】属于Ⅲ型强心苷的是( )。
A.
羟基洋地黄毒苷元
B.
蟾毒配基类
C.
紫花洋地黄苷A
D.
黄夹苷甲
E.
绿海葱苷
【判断题】引导接车时,列车以不超过25Km/h速度进站,并做好随时停车的准备。
A.
正确
B.
错误
【单选题】属于乙型强心苷元的是( )。
A.
羟基洋地黄毒苷元
B.
蟾毒配基类
C.
紫花洋地黄苷A
D.
黄夹苷甲
E.
绿海葱苷
【简答题】引导接车时,列车以不超过20km/h速度进站,并做好()的准备。
【单选题】属于Ⅰ型强心苷的是( )。
A.
羟基洋地黄毒苷元
B.
蟾毒配基类
C.
紫花洋地黄苷A
D.
黄夹苷甲
E.
绿海葱苷
【单选题】属于Ⅱ型强心苷的是( )。
A.
羟基洋地黄毒苷元
B.
蟾毒配基类
C.
紫花洋地黄苷A
D.
黄夹苷甲
E.
绿海葱苷
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