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【简答题】
有A、B、C、D四种,A和B两种的原子各有两个电子层;C、D两的原子各有三个电子层。A和B能化合生成无色无味的气体AB 2 ,C和D能化合生成C 2 D,B和D是同族,B离子和C离子核外电子数相同。 (1)这四种分别是:A____,B____,C____,D____。 (2)用电子式表示C和D形成化合物的过程:____。
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举一反三
【单选题】I understood from her that you undertook other important work ______.
A.
as well
B.
as too as
C.
as also as
D.
as good as
【单选题】下列有关诉讼时效的表述中正确的有( )。
A.
当事人可以约定延长或缩短诉讼时效
B.
当事人未提出诉讼时效抗辩的,人民法院可以对诉讼时效问题进行释明
C.
当事人在一审期间未提出诉讼时效抗辩,在二审期间提出的,人民法院应予支持
D.
当事人约定同一债务分期履行的,诉讼时效期间从最后一期履行期限届满之日起计算
E.
当事人对支付存款本金及利息请求权提出诉讼时效抗辩的,法院不予支持
【单选题】________ the words,the daughter understood what her mother was trying to tell her.
A.
To be heard
B.
To hear
C.
Heard
D.
Hearing
【简答题】用45钢制造主轴,其加工工艺的路线为:下料——锻造——退火——粗加工——调质处理 试问:(1)调质处理的作用。(2)调质处理加热温度范围。
【单选题】The young lady spoke so fast that I understood ____ of her speech.
A.
a little
B.
little
C.
a bit
D.
lot
【简答题】As soon as I saw her, I understood I was in trouble. The tiny 10-year-old girl was staring at me with that specific facial expression which probably only dentists have to enjoy all day long! Whatever ...
【单选题】Judy found her difficult to make herself understood.
A.
her
B.
to make
C.
herself
D.
understood
【简答题】I understood her very well, for I had been accustomed to the f_____ tongue of Madame Pierrot 。
【单选题】C620车床主轴的性能要求:一般水平的综合机械性能;大端轴颈等部位较高的硬度及耐磨性。若选择45钢来制造,其加工工艺路线中为满足轴颈表面使用性能的最终热处理为:( )
A.
退火
B.
表面淬火和低温回火
C.
正火
D.
高温回火
【多选题】下列有关诉讼时效起算表述正确的是( )。
A.
有约定履行期限的债权请求权,从期限届满之日的第二天开始计算
B.
附条件的债权请求权,从条件成就时开始计算
C.
附期限的债权请求权,从期限到达时开始计算
D.
请求他人不作为的债权请求权,应当自义务人违反不作为义务时开始计算
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