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【单选题】
The experiment is______failure．But do remember that，in the face of failure，you should still keep up good state of mind．A.
/；the；the
B.
a；/；the
C.
the；/；the
D.
a；/；a
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反馈参考答案：
举一反三
【单选题】We should love ourselves first, then we can love our family members.
A.
We should
B.
, then
C.
we can
D.
没有错误
【单选题】We should give love to the children _____ lost their parents in the earthquake (地震). [ ]
A.
who
B.
whom
C.
those
D.
which
【单选题】We should love our oceans and do something to them .
A.
plant
B.
find
C.
harm
D.
protect
【判断题】机床传动链的误差或滚刀的制造、安装误差所造成的齿轮加工误差,是以分度蜗杆一转或齿轮一齿为周期的,在齿轮一转中多次重复出现,称为短周期误差(即高频误差)。
A.
正确
B.
错误
【单选题】We should give love to the children ______ lost their parents in the earthquake in Wenchuan, Sichuan Province. [ ]
A.
which
B.
who
C.
whose
D.
whom
【简答题】为防止破坏分油机盆型盘的表面，应将其拆下来并浸没于清洗剂中溶掉沉积物，最后用（）清洁表面。
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