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【简答题】
请简述汽车主动安全性的定义及其分类。
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皮皮学刷刷变学霸
举一反三
【单选题】He has some trouble ____ his classmates but he has no trouble ____ doing his lessons. [ ]
A.
with; with
B.
with; in
C.
in; in
D.
in; with
【单选题】―What your English teacher doing now? ―He _____ a newspaper.
A.
is, reading
B.
is, is looking at
C.
does, watching
D.
is… is reading
【简答题】A．He is doing research. B．He works long hours in the lab. C．He is progress. D．He was unhappy until recently.
【单选题】He __________ some cooking at that time, so ___________me.
A.
did, heard
B.
was doing, heard
C.
was doing, didn’t hear
D.
did, didn’t hear
【单选题】He has some trouble ______ his classmates, but he has no trouble ______ doing his lessons.
A.
with; with
B.
in; in
C.
with; in
D.
in; with
【单选题】—What were you doing when she dropped in? —I for a while and_________ some reading.
A.
was playing; was going to do
B.
played; did
C.
had played; was going to do
D.
had played; did
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