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【单选题】
交流电压表的标尺是按照 进行刻度的。
A.
有效值
B.
平均值
C.
最大值
D.
瞬时值
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举一反三
【单选题】高压电网中,( )发生的概率最高。
A.
单相接地短路
B.
两相短路
C.
三相短路
D.
两相短路接地
【多选题】Ethical issues with prenatal genetic tests include:
A.
How to ensure that information about testing options is given in a non-directive, culturally appropriate, & supportive way?
B.
Parents need to make informed decisions about screening, diagnosis, & any actions to be taken as a result.
C.
Are the risks of prenatal diagnosis through methods such as amniocentesis worth the potential benefit?
D.
Questions about the intrinsic value of people with disabilities in society, & questions about whether it is appropriate to use eugenics-like solutions that reduce the number of babies born with disabilities.
【单选题】The meaning of "prenatal" is:
A.
生产
B.
产后的
C.
产前的
D.
乳腺炎
【简答题】M1432A 万能外圆磨床上能实现无心外圆磨削吗?为什么?
【多选题】数据文件方式管理的特点:
A.
数据共享性差
B.
冗余度大
C.
一致性差
D.
整体无结构
【单选题】下面查看视图的基本信息的语句中,正确的是
A.
SHOW TABLE STATUS LIKE '视图名'
B.
SHOW TABLE STATUS = '视图名'
C.
SHOW VIEW STATUS = '视图名'
D.
SHOW VIEW STATUS LIKE '视图名'
【简答题】数据的文件管理方式的特点是什么?
【单选题】采用文件系统方式管理数据的特点描述不正确的是()。
A.
数据联系弱
B.
数据冗余大
C.
数据不共享
D.
数据联系强可共享
【单选题】设 ,要使级数 ,绝对收敛,常数p应当(    ).
A.
 p>-1;    
B.
 p>0;    
C.
p≥0;    
D.
p≥-1.
【单选题】SDR is a procedure of______.
A.
prenatal intervention using delivery postponing techniques
B.
. surgical intervention after birth to reduce spastic symptoms
C.
isolating and severing either of the two groups of nerve roots leaving the spinal cord
D.
great risk and high efficiency
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