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【简答题】
引起血管升压素释放的有效刺激是( )|引起肾素释放的有效刺激是( )|引起尿量减少的因素是( ) A. 血浆胶体渗透压升高 B. 循环血量减少 C. 两者均是 D. 两者均否
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【简答题】句型转换。 1. Jack sends five emails to his friends every day. (对划线部分提问) ______ ______ emails ______ Jack ______ to his friends every day? 2. I sometimes play football with my friends after school. (对划线部分提...
【单选题】_____engines may only require starting valves to be fitted to one bank of cylinders.
A.
Single-cylinder Vee type
B.
In-line
C.
Multi-cylinder Vee type
D.
Any of the above
【单选题】The study of computer architecture involves ______.
A.
hardware organization only    
B.
programming requirement only
C.
both    
D.
neither
【单选题】在一段时间内只允许一个进程访问的资源称为( )。
A.
共享资源
B.
临界资源
C.
互斥资源
D.
管理资源
【单选题】Smaller engines can be made more rigid than large ones and may not have _____.
A.
connecting rods
B.
crankshaft
C.
crankcase
D.
through bolts
【单选题】下列各组物质的变化不能用勒夏特列原理解释的是(  )
A.
氯水在光照条件下颜色变浅最终变为无色
B.
将FeS固体投入到含有Cu 2 + 的废水中以除去Cu 2 +
C.
500 ℃时比室温更利于合成氨
D.
乙酸乙酯的合成中用浓硫酸比稀硫酸更有利于乙酸乙酯的生成
【判断题】而把在一段时间内只允许一个进程访问的资源称为同时访问资源。
A.
正确
B.
错误
【单选题】Exhaust pipes for separate diesel engines can be combined only when ()
A.
space limitations pr separately run pipes
B.
the engines are small auxiliary units
C.
they are arranged to pr gas backflow to each engine
D.
a waste heat boiler is installed
【单选题】Emails are _____ and _____ than the Post Office.
A.
Emails are slower and more expensive than the Post Office.
B.
Emails are less expensive and considerably quicker than the Post Office.
C.
Emails are great and more fun than the Post Office.
【单选题】Smaller engines can be made more rigid than large ones and may not have _____.
A.
through bolts
B.
turbo-chargers
C.
bed plates
D.
columns
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