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【单选题】
当接通启动电路开关启动发动机时,蓄电池 。A.
吸收发电机提供的电能
B.
将发电机的电能转化为化学能存储
C.
吸收电路中的瞬变电压
D.
向起动机连续供给强大电流
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【简答题】Which sentence is the topic sentence in Body 1? Write it down.
【单选题】变量定义为$x=1,$y=2,$z=3；以下语句执行后$x、$y、$z的值是 if($x>$y) $z=$x； $x=$y； $y=$z；
A.
$x=1，$y=2，$z=3
B.
$x=2，$y=3，$z=3
C.
$x=2，$y=3，$z=1
D.
$x=2，$y=3，$z=2
【简答题】变量定义为int x=1,y=2,z=3;以下语句执行后x、y、z的值是if(x>y) z=x; x=y; y=z;A. x=1,y=2,z=3 B. x=2,y=3,z=3 C. x=2,y=3,z=1 D. x=2,y=3,z=2
【简答题】Which sentence is the topic sentence in Body 2? Write it down.
【单选题】示波器是一种显示仪器。你可以用它来研究电信号 ( 例如交流电 流和电压 ) 的波形。它也可用来测量电压、电流、功率和频率 ; 实际上,它几乎可以测量涉及到振幅和波形的任何一种量。
A.
Oscilloscope is a display instrument. With it you can study the wave-form of an electric signal, such as the wave form of alternating current and voltage. You can measure voltage current, power, and frequency as well; in fact, almost any quantity that involves amplitude and waveform.
B.
Oscilloscope is a display instrument. With it you can study the wave-form of an electric signal, such as the wave form of alternating current and voltage. The heart of the oscilloscope is the cathode-ray tube (CRT).
C.
Oscilloscope is a display instrument. With it you can study the wave-form of an electric signal, such as the wave form of alternating current and voltage. You can measure voltage current, power, and frequency as well. The electron gun consists of a cathode , a control grid, an anode and two sets of deflection plates.
D.
Oscilloscope is a display instrument. With it you can study the wave-form of an electric signal, such as the wave form of alternating current and voltage. You can measure voltage current, power, and frequency as well; in fact, The heart of the oscilloscope is the cathode-ray tube (CRT). This consists of the base, neck ( an electron gun is included), bulb and the face -plate (screen).
【单选题】关于恙虫病立克次体的描述，错误的是
A.
是恙虫病的病原菌
B.
为专性细胞内寄生的微生物
C.
以二分裂方式繁殖
D.
对四环素敏感，可以用于治疗
E.
可以在没有细胞的人工培养基上生长和传代
【多选题】Please find two appropriate examples to support the topic sentence.topic sentence: To become a good writer, a student should write often.
A.
For example, she should try to write every day because writing is important.
B.
For example, she should keep a journal and write in it every evening before bed.
C.
For example, she can find an email friend and write message frequently.
D.
For example, she never gives up writing.
【多选题】Please find two appropriate examples to support the topic sentence. Topic sentence: To become a good writer, a student should write often.
A.
For example, she should try to write every day because writing is important.
B.
For example, she should keep a journal and write in it every evening before bed.
C.
For example, she can find an email friend and write message frequently.
D.
For example, she never gives up writing.
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