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【单选题】
一炉钢水的浇注时间与（）无直接关系。A.
二冷水量
B.
出钢量
C.
拉速
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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
【单选题】In most applications the graph on the oscilloscope display shows how signals change over time: the vertical (Y) axis represents and the horizontal (X) axis represents .
A.
voltage...time
B.
frequency...time
C.
voltage...period
D.
current...time
【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】Each type of multimeter has its advantages. Used as a voltmeter, 1 multimeteris usually better because its resistance is much higher, 1 Mega-ohm or 10 Mega-ohm, compared to 200 kilo ohm for 2 multi-me...
【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).
【多选题】Each type of multimeter has its advantages. Used as a voltmeter, ( ) multimeter is usually better because its resistance is much higher, 1 Mega-ohm or 10 Mega-ohm,compared to 200 kilo-ohm for ( ) muli...
A.
an analog
B.
a digital
C.
voltage
D.
current
【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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