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【单选题】
关于食管下括约肌(LES),以下说法错误的是()
A.
正常状态下呈收缩状态
B.
若LES压力降低会造成胃食管反流
C.
GERD患者LES压力多降低
D.
多喝咖啡可加重胃食管反流
E.
某些激素,例如胆囊收缩素、胰高血糖素可预防胃食管反流
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【单选题】Woman: The clerk said that we had to wait until after lunch to pick up the papers. Man: But what are we going to do to kill time before then? Question: What does the man mean?
A.
He doesn't have anything to do.
B.
He believes she is wrong about the pick-up time.
C.
Before lunch is a great time to pick up the document.
D.
Time passes very quickly.
【单选题】When the woman saw that her son was OK after the car accident, she said , “Well, dear, you are the most important for me, not the expensive car.”
A.
in peace
B.
in amazement
C.
in disbelief
D.
in relief
【单选题】酶竞争性抑制作用的特点是
A.
k\r\n m \r\n值不变,V\r\n max \r\n降低
B.
k\r\n m \r\n值降低,V\r\n max \r\n不变
C.
k\r\n m \r\n值增高,V\r\n max \r\n不变
D.
k\r\n m \r\n值不变,V\r\n max \r\n增加
E.
k\r\n m \r\n值降低,V\r\n max \r\n降低
【简答题】以下关于《茶经》内容的阐述,哪些是正确的( )
【简答题】组织结构中含有间隙腺毛的中药是( )。 A.薄荷B.绵马贯众C.广藿香D.荆芥A.B.C.D.E. E
【单选题】竞争性抑制剂与酶结合的部位
A.
活性中心为必须基团
B.
活性中心底物结合基团
C.
调节亚基
D.
边构基团
E.
活性中心催化基团
【单选题】下列选项中不属于低碳消费观念的是()。
A.
改变过分追求便利的消费方式
B.
改变奢侈和炫耀型消费方式
C.
适当增加产品的种类便于选择性消费
D.
减少碳排放的同时,通过碳补偿为减排出力
【单选题】竞争性抑制剂与酶结合的部位
A.
活性中心为必须基团
B.
活性中心底物结合基团
C.
调节亚基
D.
边构基团
E.
活性中心催化基团
【单选题】The young woman said that it took her only two days to learn how to properly ________crayfish.
A.
peal
B.
peel
【单选题】存在于不同种属之间的共同抗原是
A.
异嗜性抗原
B.
同种异型抗原
C.
交叉抗原
D.
自身抗原
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