【单选题】【消耗次数：1】
孕期补充下列哪种维生素可预防胎儿神经管畸形的发生？
①
烟酸
②
叶酸
③
维生素C
④
维生素A
参考答案：
复制
纠错
相关题目
随机题目
【单选题】
11.Andrew was determined to ______ a computer career after graduation.
①
apply
②
shave
③
purse
④
select
【单选题】
At the bus stop _____ a soldier and two young people on their way to North Carolina.
①
were
②
was
③
is
④
waiting
【单选题】
12.Among these articles, which do you think are most ______ to interest our students?
①
competent
②
likely
③
awkward
④
unexpected
【单选题】
2.I couldn’t understand why he pretended ______ in the bookstore.
①
to see me not
②
not to see me
③
not see me
④
to see not me
【单选题】
In the meantime, the question facing business is whether such research is _____ the costs.
①
worth
②
worth of
③
worthy
④
worthwhile
【单选题】
7. They hope to_________the source of the infection.
①
track down
②
look down
③
look at
④
back down
【单选题】
1.The movie star ______ with your sister, didn’t he?
①
was used to dance
②
used to dancing
③
used to dance
④
was used to dancing
【单选题】
7.We had warned him________the danger but he turned a deaf ear to our warning.
①
to
②
along
③
in
④
of
【单选题】
8. Herson didnotseemto_____anyimportanceto what she had said.
①
stick
②
notice
③
attach
④
remind