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【单选题】
关于情感性障碍的生化研究结果,目前多数学者认为是A.
去甲肾上腺素的活性升高导致抑郁
B.
多巴胺代谢产物高香草酸升高，导致抑郁
C.
去甲肾上腺素降低导致躁狂发作
D.
5-羟色胺升高导致抑郁发作
E.
5-羟色胺降低导致抑郁发作
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举一反三
【单选题】What ______ she usually _____ on weekends?
A.
did, do
B.
do, do
C.
does, do
D.
did, do
【单选题】.--- What do you think of them? ---I like the first girl ______wears a blue skirt. She did ______of all.
A.
which, well
B.
who, better
C.
that, best
【单选题】What did the woman especially like to do?
A.
She liked to take a walk in the mountain.
B.
She liked to enjoy the silence.
C.
She liked to live in the cabin.
【简答题】what did she do in Gull Lake Biological Station? She worked as_____________
【单选题】— What ____ she ____? — She went to the doctor. [ ]
A.
is; doing
B.
did; do
C.
can; do
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