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【判断题】
三极管放大电路的静态是指输入信号为零时的状态,动态是指有输入信号的状态。
A.
正确
B.
错误
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举一反三
【单选题】三极管的电极E表示
A.
基极
B.
集电极
C.
发射极
D.
正极
【单选题】【D6】 SPEAKER A: DO YOU KNOW BEIJING OPERA? SPEAKER B: OF COURS E. 【D5】______ SPEAKER A: CAN YOU INTRODUCE BEIJING OPERA TO ME? I WANT TO KNOW SOMETHING ABOUT IT. SPEAKER B: WELL, THE PLOT OF A BEIJING...
B.
WHY NOT GO WITH ME JUST TONIGHT?
C.
I WAS BORN IN BEIJIN G.
D.
I AM INTERESTED IN BEIJING OPERA.
【单选题】【D5】 SPEAKER A: DO YOU KNOW BEIJING OPERA? SPEAKER B: OF COURS E. 【D5】______ SPEAKER A: CAN YOU INTRODUCE BEIJING OPERA TO ME? I WANT TO KNOW SOMETHING ABOUT IT. SPEAKER B: WELL, THE PLOT OF A BEIJING...
B.
WHY NOT GO WITH ME JUST TONIGHT?
C.
I WAS BORN IN BEIJIN G.
D.
I AM INTERESTED IN BEIJING OPERA.
【单选题】【D7】 SPEAKER A: DO YOU KNOW BEIJING OPERA? SPEAKER B: OF COURS E. 【D5】______ SPEAKER A: CAN YOU INTRODUCE BEIJING OPERA TO ME? I WANT TO KNOW SOMETHING ABOUT IT. SPEAKER B: WELL, THE PLOT OF A BEIJING...
B.
WHY NOT GO WITH ME JUST TONIGHT?
C.
I WAS BORN IN BEIJIN G.
D.
I AM INTERESTED IN BEIJING OPERA.
【单选题】在三极管的三个电极中, C 表示的是三极管的( )极。
A.
、发射极
B.
、基极
C.
、正
D.
、集电极
【单选题】三极管的电极C表示
A.
基极
B.
集电极
C.
发射极
D.
正极
【单选题】三极管的三个电极中c表示
A.
集电极
B.
基极
C.
发射极
【单选题】After that, we studied, and, _______________ , we had dinner in a famous café on the main street, Cours Mirabeau.
A.
first
B.
finally
C.
When
【简答题】在阳光照射下绿色植物进行光合作用,吸收二氧化碳,放出氧气.我校某兴趣小组打算到小坝某农户的密封的塑料大棚内收集空气样品进行实验探究,我们应该如何收集大棚内的空气样品呢?现有备选器材:集气瓶、玻璃片、橡皮管、玻璃导管、盛满水的水槽、饮料管、试管、橡胶塞、带针帽的注射器、带盖的矿泉水瓶、塑料口袋等(说明:任意选其中的某些仪器或材料,写出一种收集空气样品的正确方法).
【简答题】在氧气、氢气、一氧化碳、二氧化碳、甲烷、熟石灰、氮气七种物质中符合下列条件的是(请用化学式填空): (1)冬天烤煤火如果不注意会使人中毒的是______; (2)天然气的主要成分是______; (3)固体可作制冷剂的是______; (4)能使带火星的木条复燃的是______; (5)可改良酸性土壤的是______; (6)具有还原性的气体化合物是______; (7)目前市场上销售的汽水饮料大...
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