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【单选题】
马歇尔-勒纳条件用数学式表达为（ ）A.
Ex + Em > 1
B.
Ex + Em < 1
C.
Ex + Em = 1
D.
Ex + Em > 0
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【单选题】中国香港的金融监督机构包括( )。 1中国香港金融管理局 2中国香港政府 3证券及期货事务监察委员会 4保险业监理处
A.
①②③
B.
①③④
C.
①②④
D.
②③④
【多选题】汽油发动机上主要的控制系统有( )、( )、( )、( )、排放控制系统和自诊断系统等。
A.
电控燃油喷射系统
B.
电控点火系统
C.
怠速控制系统
D.
进气控制系统
【单选题】A) They are tough. B) They are costly. C) They are helpful. D) They are too short.
A.
They are tough.
B.
They are costly.
C.
They are helpful.
D.
They are too short.
【简答题】A．They felt the time for sleeping was too short. B．They were too excited to have a good rest. C．They felt time passed too slowly. D．They were too hungry to fall asleep.
【单选题】中国香港的金融监管机构包括( )。 I、香港金融管理局 II、香港政府 III、证券及期货事务监察委员会 IV、保险业监理处
A.
Ⅰ、Ⅱ、Ⅲ
B.
Ⅰ、Ⅲ、Ⅳ
C.
Ⅰ、Ⅱ、Ⅳ
D.
Ⅱ、Ⅲ、Ⅳ
【单选题】How do you guess ________?
A.
did they finish the work within so short a time
B.
they finished the work within so short a time
C.
had they finished the work within so short a time
D.
will they finish the work within so short a time
【简答题】A．They can serve many people in a short time. B．They sell delicious food. C．They serve food at higher prices. D．Their service is quick and efficient.
【单选题】ECU 实施限速断油控制最主要的目的是:( ) A 、有利于减小燃油消耗量 B、有利于减少有害排放物 C 、保护三元催化转化器 D、防止发动机超速运转,造成机件损坏
A.
B.
C.
D.
D
【单选题】— When did they_______ Beijing? — At 8:00 am After a short rest they took a bus to visit Tian'anmen Square [ ]
A.
arrive in
B.
arrive at
C.
leave for
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