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【判断题】
质量作用定律是一个普遍规律,适用于一切化学反应。( )
A.
正确
B.
错误
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【单选题】河北省的( )产量居全国第一。
A.
苹果
B.
葡萄
C.
桃子
D.
板栗
【多选题】以下为可控媒介的是( )
A.
内部刊物
B.
营销信息
C.
DM
D.
广播
【多选题】河北省( )的产量居全国第一。
A.
B.
C.
D.
板栗
E.
稀土
【单选题】Your database is in ARCHIVELOG mode. You have two online redo log groups, each of which contains one redo member. When you attempt to start the database, you receive the following errors: Which statem...
A.
ALTER DATABASE DROP LOGFILE GROUP 1;
B.
ALTER DATABASE CLEAR LOGFILE GROUP 1;
C.
ALTER DATABASE CLEAR UNARCHIVED LOGFILE GROUP 1;
D.
ALTER DATABASE DROP LOGFILE MEMBER 'D:/REDO01.LOG';
【单选题】In which mode should an urgency communication from one station to all stations by direct printing telegraphy normally be established?
A.
CFEC.
B.
SFE
C.
ARQ.
D.
SSB RT.
【单选题】If a BJT is used as an amplifier, which mode should it work in?
A.
active mode
B.
saturation mode
C.
cutoff mode
D.
reverse active mode
【单选题】Which command should an administrator use to put a system in maintenance mode without rebooting?()
A.
init 0
B.
telinit m
C.
shutdown -FM
D.
sh /etc/rc.maint
【单选题】In which mode should urgency communication “to all stations” by direct printing telegraphy normally be established?
A.
FEC mode at a good propagation only possible
B.
ARQ mode
C.
FEC mode
D.
FEC mode, the ARQ mode may also be used
【多选题】河北省的(   )产量居全国第一位
A.
板栗
B.
苹果
C.
葡萄
D.
【多选题】河北省土特产品中,产量居全国第一的有()
A.
宜化龙眼葡萄
B.
深州蜜桃
C.
坝上口蘑
D.
坝上香蘑
E.
坝上草蘑
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