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【单选题】

さっきまでずっと論文の資料を( ) 。

A.
読んでいました
B.
読んでいます
举报
参考答案:
参考解析:
.
刷刷题刷刷变学霸
举一反三

【单选题】有些发动机的机油滤清器设置止回阀的目的是。

A.
在油压过高时泄压,维持主油道内的正常压力
B.
当重新起动发动机时,润滑系能迅速建立起油压
C.
滤芯堵塞时,机油通过该阀直接流入主油道,以防供油中断
D.
保护机油滤清器不因油压过高而受损坏

【单选题】听力原文:M: Do you really think both Jim and Bruce did the translation all by themselves? W: It doesn't seem likely. Don't you see not only the way they did it but also the handwriting is much like John's...

A.
Jim and Bruce copied each other's assignments.
B.
Both of their handwritings are difficult to read.
C.
Jim and Bruce did the assignments by themselves
D.
John did the assignments for Jim and Bruce.