【判断题】函数【图片】的驻点一定是函数【图片】在约束条件【图片】下的极值点.
【单选题】After the Russian government (in August 1998) allowed the Ruble to move outside its official trading range of between Ru5.70/$-Ru6.35/$, the value of the Ruble eventually ________ to around ________ b...
【单选题】化脓性关节炎和关节结核X线鉴别的最主要依据是:
【多选题】关于人均旅游收入指标(Ru)与旅游总收入指标(Rt)的变化关系,下列说法正确的有( )。
A.
Rt与Ru同方向但不同比例变化,若Rt增长速度超过Ru增长速度,则意味着旅游总收入的增加来源于游客人次的更快增长
B.
若Rt与Ru同方向但不同比例变化,Ru增长速度超过Rt增长速度,则意味着旅游总收入的增加主要来源于基本旅游收入的大幅增长
C.
Rt增大,Ru却减少,说明反映旅游总收入的增加是靠来访游客人次的增多获得的
D.
Rt减少,尺Ru却增加,表明旅游业的经营效果提高了,但来访游客数量减少,导致旅游总收入减少
E.
Rt与Ru同方向、同比例变化,表明旅游总收入的增加或减少,人均旅游收入也随着同比例的增加或减少
【单选题】From Paragraph 3, we learn that______.
A.
the use of the RU-486 pill is unsafe
B.
the RU-486 abortion drug is unlikely to spread in use to other countries until more extensive tests are performed
C.
although the track record is generally positive, some recorded effects of RU-486 warrant further study
D.
health considerations are currently the main factor hindering efforts to expand drug-induced abortions
【单选题】IPC中”RU010”表示:
B.
在”RU010”下面的件号只允许安装在”010” 件上