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【单选题】
下列不属于晶体管共发射极电路特点的是( )
A.
输出电阻大
B.
输入电阻比较适中
C.
具有较高的电流增益
D.
具有较高的电压增益
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参考答案:
举一反三
【简答题】Question 13. In what way is Carnegie-Mellon different from Stanford, Berkeley and MIT? ==== Passage 3 ==== Could you reproduce Silicon Valley elsewhere, or is there something unique about it?It wouldn...
【判断题】液体静压轴承是用油泵把高压油送到轴承间隙,强制形成油膜,靠液体的静压平衡外载荷
A.
正确
B.
错误
【单选题】Soap is more popular in liquid form than in bars in the UK – but there are good reasons to stick with the old traditional way of keeping clean, says Gareth Rubin. According to market research company ...
A.
1
B.
2
C.
3
D.
4
【单选题】世界卫生组织推荐的预防接种的4种疫苗
A.
卡介苗、麻疹疫苗、百白破混合疫苗、脊髓灰质炎疫苗
B.
卡介苗、麻疹流感、百白破混合疫苗、脊髓灰质炎疫苗
C.
卡介苗、麻疹疫苗、伤寒疫苗、霍乱疫苗
D.
麻疹疫苗、流感疫苗、脊髓灰质炎疫苗、天花疫苗
E.
卡介苗、麻疹疫苗、风疹疫苗、脊髓灰质炎疫苗
【单选题】Question 13 is based on the above passage.In the writer's opinion, what is the best way to learn grammar?
A.
Playing games with a set of rules.
B.
Learning grammar naturally as you grow up.
C.
Recalling how you learned your mother tongue.
D.
Doing a lot of grammar exercises.
【单选题】Soap is more popular in liquid form than in bars in the UK – but there are good reasons to stick with the old traditional way of keeping clean, says Gareth Rubin. According to market research company ...
A.
1
B.
2
C.
3
D.
4
【判断题】液体静压轴承是用油泵把高压油送到轴承间隙,强制形成油膜,靠液体的静压平衡外载荷。
A.
正确
B.
错误
【单选题】In what way is Carol Fletcher typical of the company's senior staff?
A.
She started working for the company at a low level.
B.
She brought experience from another industry.
C.
She used to run her own company.
【单选题】Soap is more popular in liquid form than in bars in the UK – but there are good reasons to stick with the old traditional way of keeping clean, says Gareth Rubin. According to market research company ...
A.
12
B.
2
C.
3
D.
4
【单选题】液体静压轴承是靠液体的( )平衡外载荷的。
A.
流速
B.
静压
C.
动压
D.
中林行
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