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【多选题】
有关氧解离曲线的叙述,正确的有 ( )
A.
氧解离曲线是指血氧饱和度与血氧分压之间关系的曲线
B.
曲线上段比较平坦,表明氧分压的变化对血氧饱和度影响不大
C.
曲线中段比较陡直,表明血氧分压稍有下降,氧合血红蛋白就放出许多O 2
D.
曲线下陡直,表明血氧分压下降很多,氧合血红蛋白才放出少量O 2
E.
血液中CO 2 分压升高、H + 浓度升高时,曲线右移
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参考答案:
举一反三
【单选题】已知某矩形波频率为2Hz,占空比为60%,请问该波形1个周期内高电平部分时间是( )?
A.
0.5秒
B.
0.2秒
C.
0.3秒
D.
0.4秒
【单选题】油脂可以促进下列哪种维生素在人体内的吸收( )
A.
维生素 C
B.
维生素 B 1
C.
维生素 A
D.
维生素 B 2
【单选题】在体内可由胆固醇转变而成的维生素是
A.
维生素A
B.
泛酸
C.
维生素E
D.
维生素K
E.
维生素D
【单选题】人体内维生素A的主要储存器官是
A.
血液
B.
皮肤
C.
肾脏
D.
肝脏
E.
骨髓
【单选题】听力原文:M: I hear you got lost on your way to the meeting at the hotel. W: I don't know how I did it. I’ve been there a million times. Q: What does the woman mean? (13)
A.
She knew the way very well.
B.
She doesn't know where the hotel is.
C.
She thinks it's an expensive hotel.
D.
She got lost many times.
【简答题】脂溶性维生素______在储存体内,______每天供应;水溶性维生素______在体内储存.需______补充。
【单选题】人体内相同质量的下列几种物质储存能量最多的是(  )
A.
脂肪
B.
糖类
C.
蛋白质
D.
维生素
【单选题】听力原文:M: How do you like the party held at the hotel last night? W: Well, the food was delicious and I had a good time there. Q: Where was the party held? (3)
A.
At a hotel.
B.
At the man's house.
C.
At a garden.
D.
At the woman's house.
【单选题】听力原文:M: Mrs. Wang, what was the hotel like? W: Oh, I stayed in the most comfortable hotel in the city. Q: What does the woman think of the hotel? (9)
A.
Terrible.
B.
Comfortable.
C.
Noisy.
D.
Expensive.
【单选题】听力原文:W: Renting the conference room at the hotel will cost us too much. We’re already running in the red. M: How about using our dining room for the meeting? Q: What's worrying the woman? (14)
A.
The organization of a conference.
B.
The cost of renting a conference room.
C.
The decoration of the conference room.
D.
The job of cleaning up the dining room.
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