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【单选题】
图所示的中,交流电压u1与u2的相位关系是( )。A.
u1比u2超前75°
B.
u1比u2滞后75°
C.
u1比u2超前30°
D.
无法确定
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【单选题】The two things __________ they felt very proud are Jim’s gold watch and Della’shair.
A.
about which
B.
of which
C.
in which
D.
for which
【单选题】Task 2 Directions: This task is the same as Task 1. The 5 questions or unfinished statements are numbered 41 through 45. Thomas Alva Edison lit up the world with his invention of the electric light. W...
A.
24
B.
8
C.
12
D.
16
【单选题】The two things __________ they felt very proud are Jim’s gold watch and Della’s hair.
A.
about which
B.
of which
C.
in which
D.
for which
【单选题】Task 2 Directions: This task is the same as Task 1. The 5 questions or unfinished statements are numbered 41 through 45. Thomas Alva Edison lit up the world with his invention of the electric light. W...
A.
he became a telegraph operator, a newsboy, and then got his first patent
B.
he became a newsboy, got his first patent, and then became a telegraph operator
C.
he got a patent, became a telegraph operator, and then became a newsboy
D.
he became a newsboy, a telegraph operator, and then got a patent
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