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分段函数:输入x,计算y值,输出y,其中: x<0 y=2x+3 x=0,y=0 x>0,y=(x+7)/3 #include main() { int x,y; scanf("%d",&x); if(x<0) (1) ; (2) y=0; (3) y=(x+7)/3; printf(“%d”,y); }
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【单选题】The eyes of Jean Grace brought Pete out of his world of self-pity _______.
A.
and he tried to forget the memory of his sweetheart
B.
and he remembered his lost love
C.
and he began to look at the world optimistically
D.
and he no longer felt the pain in him
【简答题】(12分) 工业上以氯化钾和钛白厂的副产品硫酸亚铁为原料可得到硫酸钾、过二硫酸钠和铁红颜料等产品，该方法原料的综合利用率较高。 （1）基态钛原子的核外电子排布式为 。 （2）TiCl 4 在常温下呈液态，而FeCl 3 可用升华法提纯，则两种氯化物均属于 晶体。 （3）SO 4 2— 和 S 2 O 8 2— （过二硫酸根）结构中，硫原子均位于由氧原子组成的四面体的中心，且所有原子的最外层电子均满...
【单选题】What problem arose when Jean went back to work.'?
A.
Jean got angry at Bill's idle life.
B.
Bill failed to adapt to the new situation.
C.
Bill blamed Jean for neglecting the family.
D.
The children were not taken good care of.
【简答题】The maxim was that when a married couple saw red lawyers saw green.
【单选题】Woman: I went downtown yesterday and saw Jean's sister there. Man: Unlike her sister, Jean doesn't have lots of time to spend buying dresses. Question: What do we learn about Jean?
A.
Jean was too busy to go shopping.
B.
Jean saw her sister downtown yesterday.
C.
Jean and her sister had a lot of time to spend.
D.
Jean wasn't a good buyer of dresses like her sister.
【简答题】Pete Richards was the loneliest man in town on the day that little Jean Grace opened the door of his shop. Pete's grandfather had owned the shop until his death. Then the shop became Pete's. The front...
【单选题】相同条件下，下列配离子中最稳定的是（）。
A.
[Cu（NH 3 ） 4 ] 2+
B.
[Ag（NH 3 ） 2 ] +
C.
[Cu（en） 2 ] 2+
D.
[CaY] 2-
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