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【单选题】
肾上腺素平喘机制主要是A.
抑制过敏物释放
B.
抑制磷酸二酯酶，使细胞CAMP增加
C.
激动β2受体使腺苷酸环化酶活性增强，细胞内CAMP浓度增加
D.
兴奋多巴胺β-羟化酶，使去甲肾上腺素合成增加
E.
直接松弛平滑肌
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反馈参考答案：
举一反三
【单选题】He suggested ______ a lecture given by Professor White on English language learning.
A.
me to attend
B.
my attending
C.
my attention
D.
me attending
【单选题】He suggested a small bu t improvement on our former plan; I real appreciate i t.
A.
civilian
B.
solemn
C.
distinct
【单选题】He explained to the class what he suggested ____ his idea ____．
A.
to make, accepted
B.
making, agreed to
C.
should make, receive
D.
make, passed
【单选题】He suggested__________ a．1ecture given by Professor Gu on English language learning．
A.
me to attend
B.
my attending
C.
my attention
D.
me attending
【单选题】I didn' t feel like ______,so he suggested______ a taxi.
A.
to walk taking
B.
walking taking
C.
to walk to take
D.
walking to take
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