下列关于要约和要约邀请的说明，正确的是( )。 A．要约不能撤销，只能撤回 B．

照样子写词语。   

1．一片片(ABB)                                                                       

2．无穷无尽(ABAC)                                                                                    

3．以“一”字开头的成语：   

     例：一视同仁                                                                                        

4．以“目”字开头的成语：

     例：目瞪口呆                                                                                   

救生圈要注哪些标示（）。

A.船名

B.船籍港

C.序号

D.以上都是

附睾

A．精子产生部位
B．精子成熟部位
C．精浆产量最大的部位
D．精浆中神经内分泌物质的产生部位
E．维持精浆pH的部位

然而人的安排终于被“偶然”毁坏了。这应该是一个“意外”。但是这“意外”却毫无怜悯地打击了年轻的心。我离家不过一年半光景，就接到了姐姐的死讯。……对于姐姐，她生前我没有好好地爱过她，死后也不曾做过一样纪念她的事。她寂寞地活着，寂寞地死去。死带走了她的一切，这就是在我们那个地方的旧式女子的命运。（巴金《爱尔克的灯光》）

文中的“偶然”和“意外”为什么被加上引号？

During recent years we have heard much about "race": how this race does certain things and that race believes certain things and so on. Yet, the (51) phenomenon of race consists of few surface indications.

We judge race usually from the coloring of the skin: a white race, a brown race, a yellow race and a black race. But (52) you were to remove the skin you could not tell anything about the race to which the individual belonged. There is nothing in physical structure, the brain or the internal organs to (53) a difference.

There are four types of blood. All types are found in every race, and no type is distinct to any race. Human brains are the (54) . No scientists could examine a brain and tell you the race to which the individual belonged. Brains will (55) in size, but this occurs within every race. (56) does size have anything to do with intelligence. The largest brain ever examined belonged to a person of weak (57) . On the other hand, some of our most distinguished people have had (58) brains.

Mental tests which are reasonably (59) show no differences in intelligence between races. High and low test results both can be recorded by different members of any race. (60) equal educational advantages, there will be no difference in average standings, either on account of race or geographical location.

56().

A.Only 

B.Or 

C.Nor 

D.So