一用户的E-mail地址为info@sina.com,该用户的用户名为( )。A.

题型:单项选择题

问题:

一用户的E-mail地址为info@sina.com,该用户的用户名为( )。

A.info

B.sina

C.sincom

D.info@sincom

考点:电子商务师助理电子商务师助理电子商务师3
题型:单项选择题

把等式一边的某项(    )后移到另一边,叫做移项.

题型:单项选择题

在担保方式中,只能由第三方担保的方式是( )。

A.质押

B.抵押

C.留

D.保证

题型:单项选择题

影响硬化混凝土干缩与徐变的主要因素有()。

A.水泥细度

B.水泥品种

C.含砂率

D.水泥用量

E.骨料弹性模量

题型:单项选择题

鸟类和哺乳类动物的心脏都具有四个腔.其优点在于(  )

A.能使动脉血和静脉血混合

B.能使动脉血和静脉血分离

C.能使血液的流动速度变快

D.能使血液的流动速度变慢

题型:单项选择题


Directions: There are 10 blanks in the following passage. For each numbered blank, there are 4 choice marked A, B, C and D.

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.

A.since

B.if

C.as

D.while

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