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【简答题】
[ 两种图线结合处理实验数据 ] 由金属丝制成的电阻器阻值会随温度的升高而变大.某同学为研究这一现象,亲自动手通过实验描绘这样一个电阻器的伏安特性曲线.可供选择的实验器材有: A .待测电阻器 R x (2.5 V,1.2 W) B .电流表 A(0 ~ 0.6 A ,内阻为 1 Ω) C .电压表 V(0 ~ 3 V ,内阻未知 ) D .滑动变阻器 (0 ~ 10 Ω ,额定电流为 1 A) E .电源 ( E = 3 V ,内阻 r = 1 Ω) F .定值电阻 R 0 ( 阻值为 5 Ω) G .开关一个和导线若干 (1) 实验时,该同学采用电流表内接法,并且电阻器两端电压从零开始变化,请在方框内画出实验电路图.
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举一反三
【单选题】What does the phrase "two ways" refer to in the 6th paragraph?
A.
Calling on customers and communication in writing.
B.
Orally and verbally.
C.
By face-to-face contact and by correspondence.
D.
By trade delegations and groups.
【简答题】试用力法求解如图12-24a所示超静定梁，并作出其弯矩图，已知梁的抗弯刚度为EI。
【单选题】According to the passage, how many ways are there for water to get into the air?
A.
Two.
B.
Three.
C.
Four.
D.
Five.
【简答题】正交表具有()和正交性的特性。
【单选题】(练习1-4) What does the phrases “two ways” refers to in the 6th paragraph?
A.
calling on customer and communication in writing
B.
orally and verbally
C.
by face-to-face contact and by correspondence
D.
by trade delegations and groups
【单选题】What are two ways that we can organize paragraphs according to thispresentation?
A.
introduction, body, and conclusion
B.
block style. and point-by-point style
C.
summative and narrative
D.
point-by-point style. and comparative style
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