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【单选题】
关于地球上物体由于随地球自转而运动具有的向心加速度,正确的说法有 ( )A.
. 方向都指向地心.
B.
. 赤道处最小.
C.
. 两极处最小.
D.
. 同一地点质量大的物体向心加速度也大
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举一反三
【单选题】Phonetics is the study of ______.
A.
all the sounds that occur in the world's languages
B.
speech sounds used by human languages to represent
C.
the differences between sounds used In human languages and sounds in nature
D.
how phonological differences can lead to misunderstanding
【单选题】Which of the following is NOT the feature of the ESS study program?
A.
There are various specialties in different models.
B.
Its purpose is to provide children a chance for further development in after-school hours.
C.
It does help greatly m make children be versatile students.
D.
Each ESS competes furiously with local schools.
【单选题】使用文件前要先打开文件。在执行完打开文件系统调用后，系统会返回给用户一个( )。 A) 文件长度 B) 内存地址 C) 文件描述符 D) 文件打开方式
A.
B.
C.
D.
【单选题】在下图共发射极放大电路中,关于 耦合电容 C 1 、 C 2 的作用描述不正确的是
A.
隔断放大电路与信号源之间的直流通路
B.
隔断放大电路与负载之间的直流通路
C.
保证交流信号通过放大电路
D.
隔断交流信号通过放大电路
【简答题】（英译中）Partial shipment is allowed.
【简答题】基本共发射极放大电路中,耦合电容C1、C2 的作用是 。
【单选题】I often played truant then. How I wish I ______ the time on my study!
A.
spent
B.
were spending
C.
had spent
D.
could spend
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