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【单选题】
以下有关建筑给水系统分类的叙述中,哪一项是正确的?( )A.
基本系统为：生活给水系统、生产给水系统、消火栓给水系统
B.
基本系统为：生活给水系统、杂用水系统、消防给水系统
C.
基本系统为：生活给水系统、生产给水系统、消防给水系统
D.
基本系统为：生活给水系统、杂用给水系统、生产给水系统、消防给水系统
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【单选题】The key is that ____ full your schedule is, only when you try really hard ____ always fit some more things in it [ ]
A.
no matter how; can you
B.
no matter what; can you
C.
however; you can
D.
whatever; can you
【简答题】What’s the problem theworld is flow facing? Theworld is not only hungry but it is also thirsty for___________
【简答题】杂质半导体分为 型半导体和 型半导体,前者是将 元素掺杂进本征半导体,后者是将 元素掺杂进本征半导体;
【多选题】儿茶酚胺对心肌细胞离子通道的影响是______。
A.
增强心室肌细胞平台期Ca 2+ 内流和RYRCa 2+ 释放
B.
增强窦房结细胞4期的内向电流
C.
降低肌钙蛋白与Ca 2+ 的亲和力
D.
促进心室肌细胞0期Na + 的内流
E.
促进房室结细胞0期Ca 2+ 的内流
【单选题】儿茶酚胺对心肌细胞的作用主要是
A.
增加K 通道的通透性
B.
增加Na 通道的通透性
C.
增加Ca 和K 的通透性
D.
降低K 通道的通透性
E.
增加Ca 通道的通透性
【单选题】The thinking of a motion can be excited only when______.
A.
even persons are promoted to thinking beings
B.
big and vital issues are widely debated
C.
great thinkers have been brought up
D.
people allow themselves to think independently
【单选题】The priest asked the only listener if he would be willing to have a shortened service. This suggests ________.
A.
he preferred a short one
B.
he wanted to leave soon
C.
the only listener couldn't arouse his spirits
D.
he was a priest fond of only short prayers
【单选题】One motion is adopted by the Security Council only if ______.
A.
14 of 15 members accept this motion
B.
all the members have no objection to the motion
C.
9 members agree on it and all the permanent members approve of it
D.
all the permanent members pass it
【单选题】What time was lunch in the hotel?
A.
From twelve o'clock to one o'clock.
B.
Only after one thirty.
C.
From half past twelve to half past thirteen.
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