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【单选题】
X 线机常见故障现象不包括A.
有规律性的故障现象
B.
偶然的和时有时无的故障现象
C.
由严重到轻微的故障现象
D.
突然而持续的故障现象
拍照语音搜题，微信中搜索"皮皮学"使用
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举一反三
【单选题】My summer job wasn't ________ fun, but it was ________ real learning experience for me. [ ]
A.
a; a
B.
the; /
C.
/; a
D.
a; /
【简答题】Thomas was a real friend, for he advised me as well as (help)____________me with my Arabic.
【简答题】His remarks left me _________ about his real purpose.
【单选题】In some places, the ()weather can be a real challenge for me. It ’s often sunny in the morning and it is rainy at noon.
A.
variety
B.
variable
C.
sensible
D.
specialty
【简答题】His remarks left me (wonder) ______ about his real purpose.
【单选题】Thomas was a real friend, for he advised me as well as ________ me with my English. [ ]
A.
help
B.
to help
C.
helping
D.
helped
【单选题】Thomas was a real friend, for he advised me as well as ___________ me with my Arabic. [ ]
A.
helping
B.
help
C.
helped
D.
to help
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