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【单选题】
钢与含碳质量分数( )%为界,含碳质量分数小于该值,大于。A.
0 .25
B.
0.6
C.
0.77
D.
2. 0
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举一反三
【单选题】I lost touch with most of my old school friends. With the help of internet, I have finally _________most of them.
A.
tracked down
B.
tracked out
C.
modeled after
D.
looked for
【单选题】To my _____, I lost touch with my best friend.
A.
regret
B.
satisfaction
C.
happiness
D.
belief
【单选题】My playmate ________ when I was six and we lost touch with each other since then.
A.
moved away
B.
moved around
【简答题】I've lost touch _____ all my old friends.
【多选题】X是第三周期非金属元素，该原子如果要达到8电子稳定结构，需要的电子数小于其次外层和最内层的电子数之差，且等于最内层电子数的整数倍。下列说法正确的是
A.
X最高价氧化物对应的水化物不一定是强酸
B.
X元素的氢化物化学式一定为H 2 X
C.
X的单质—定是良好的半导体材料
D.
X元素的氧化物—定能与烧碱反应
【简答题】根据汉语提示完成下列句子。 1. I don't keep in touch with her, because I lost her ______ ______ (电话号码). 2. The young lady receives a ______ ______(金戒指) from a rich man on Valentine's Day (情人节). 3. ______ ______ (打扰...
【单选题】It was not until 2018 ( ) I lost touch with my best friend, Eric.
A.
since
B.
that
C.
before
D.
when
相关题目：
【单选题】To my _____, I lost touch with my best friend.
A.
regret
B.
satisfaction
C.
happiness
D.
belief