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【单选题】
下列哪项不是艾滋病的传播途径:A.
性传播
B.
母婴垂直传播
C.
血液传播
D.
虫媒传播
E.
以上答案全不对
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举一反三
【单选题】According to Adel Safty, ________.
A.
. people should begin to study foreign languages after age 8
B.
. learners who have a friend to help them study a language better
C.
. age has a big effect on people ’ s ability to learn a foreign language
D.
. people ’ s linguistic ability grows with their age and experience
【单选题】According to the paragraph 3. California has cut the warming effect from diesel emissions by______.
A.
using particulate filters on cars and trucks and switching to low-sulfur diesel
B.
turning to efficient biomass cook stoves instead of using traditional mud stoves
C.
replacing kerosene lamps in villages with solar lamps
D.
deploying modern brick kilns
【简答题】Please __________ according to your .
【判断题】E5016(J506)和E5015(J507)焊条不同之处，是前者含钾较多，正因为如此，两种焊条在同样条件下焊接，E5016(J506)焊条比E5015(J507)焊条容易出氢气孔。( )
A.
正确
B.
错误
【单选题】颈外静脉
A.
在胸廓乳突肌表面斜向外下
B.
与同名动脉伴行
C.
周围排列有颈外侧深淋巴结
D.
在胸锁乳突肌前缘穿深筋膜汇入锁骨下静脉或静脉角
E.
由下颌后静脉前支和耳后静脉汇合而成
【简答题】Choose the right picture according to the dialogue you hear. A B C D E F 1. _...
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