快来看！2021年四川普通研究生入学考试报名条件公布了

下列关于我国居民委员会的表述，正确的有( )。

A.居民委员会对居民会议负责
B.居民委员会受上级政权机关的领导
C.居民委员会是最基层的一级政权机关
D.居民委员会由主任、副主任和委员5至9人组成

下列参与核苷酸合成的酶中受 5-氟尿嘧啶抑制的是（ ）

A. 胸苷酸合酶
B. 脲苷激酶
C. CPSII
D. PRPP 合成酶

子宫腺肌病是指子宫内膜异位于
A.输卵管 B.子宫肌层 C.子宫浆膜层 D.子宫腺体

Ancient Greek philosopher Aristotle viewed laughter as“a bodily exercise precious to health.”But---_____some claims to the contrary,laughing probably has little influence on physical filness Laughter does_____short-term changes in the function of the heart and its blood vessels,____heart rate and oxygen consumption But because hard laughter is difficult to____,a good laugh is unlikely to have_____benefits the way,say,walking or jogging does.____,instead of straining muscles to build them,as exercise does,laughter apparently accomplishes the____,studies dating back to the 1930’s indicate that laughter.muscles,Such bodily reaction might conceivably help____the effects of psychological stress.Anyway,the act of laughing probably does produce other types of______feedback,that improve an individual’s emotional state.______one classical theory of emotion,our feelings are partially rooted_______physical reactions.It was argued at the end of the 19th century that humans do not cry______they are sad but they become sad when te tears begin to flow.Although sadness also_______tears,evidence suggests that emotions can flow_____muscular responses.In an experiment published in 1988,social psychologist Fritz Strack of the University of würzburg in Germany asked volunteers to____a pen either with their teeth-thereby creating an artificial smile–or with their lips，which would produce a（n）_____expression.Those forced to exercise their enthusiastically to funny catoons than did those whose months were contracted in a frown，_______that expressions may influence emotions rather than just the other way around____，the physical act of laughter could improve mood.

A.into
B.from
C.towards
D.beyond