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【单选题】
体内一碳单位代谢的载体是A.
叶酸
B.
二氢叶酸
C.
四氢叶酸
D.
维生素B12
E.
维生素B6
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举一反三
【单选题】When the volunteers went to visit the children in the mountainous areas, they were greeted by the children _________.
A.
with open arms
B.
in open arms
【简答题】With blood pouring from his leg, he_____ a nearby house. 2.Ironically, almost all manufacturers claim that their drinks _____ artificial colorings. 3. It took me several hours to ____ that awful (墙纸) ...
【单选题】When can the volunteers sign up for the teaching program this week?
A.
On Tuesday and Thursday morning.
B.
On Tuesday and Thursday afternoon.
C.
On Tuesday and Wednesday morning.
D.
On Tuesday and Wednesday afternoon.
【判断题】When the Olympics finished, all the volunteers were invited to take part in a parade through the streets of Canberra.()
A.
正确
B.
错误
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