设有下列宏定义:#define A 2 #define B A+3 则执行赋值语

题型:填空题

问题:

设有下列宏定义:#define A 2
#define B A+3
则执行赋值语句;t=B*2;t为int型变量后的值是______。

考点:计算机等级考试C语言二级C语言笔试
题型:填空题

WASHINGTON—Laura Straub is a very worried woman. Her job is to find families for foreign teenagers who expect to live with American families in the summer.

It is not easy, even desperate.

“We have many children left to place—40 out of 75,” said Straub, who works for a foreign exchange programme called LEC.

When foreign exchange programmes started 50 years ago, more families were accommodating. For one thing, more mothers stayed at home. But now, increasing numbers of women work outside the home. Exchange-student programmes have struggled in recent years to sign up host families for the 30, 000 teenagers who come from abroad every year to spend an academic year in the United States, as well as the thousands more who take part in summer programmes.

School systems in many parts of the U.S., unhappy about accepting non-taxpaying students, have also strictly limited the number of exchange students they accept. At the same time, the idea of hosting foreign students is becoming less exotic(有异国情调的).

In search for host families, who usually receive no pay, exchange programmes are increasingly broadening their requests to include everyone from young couples to the retired.

“We are open to many different types of families,” said Vickie Weiner, eastern regional director for ASSE, a 25-year-old programme that sends about 30,000 teenagers on academic-year exchange programmes worldwide.

For elderly people, exchange students “keep us young—they really do”, said Jen Foster, who is hosting 16-year-old Nina Post from Denmark.

小题1:According to the text, why was it easier for Laura Straub to find American families for foreign students?

A.American school systems were better than now.

B.The government was happy because it could gain tax.

C.Foreign students paid hosting families a lot of money.

D.More mothers didn’t work outside and could look after children.小题2:To deal with the problem in recent years, exchange programmes have to ______.

A.extend the range of host families

B.limit the number of the exchange students

C.borrow much money to pay for the costs

D.make hosting foreign students more exotic小题3:Which of the following is the best title of this passage?

A Exchange Students Keep Old People Young.

B. Idea of Hosting Students is Different.

C. Foreign-exchange Program Is Going on.

D U.S. Struggle to Find host Families.

题型:填空题

如图,P在∠AOB的内部,PC⊥AO于C,PD⊥OB于D,PD=PC,当∠AOP=(2x-10)度,∠BOP=(x+5)度时,∠AOB=______度.

题型:填空题

据报道,某国科学家在一块60万年前来到地球的火星陨石上发现了有机生物的痕迹,因为该陨石由二氧化碳化合物构成,该化合物产生于甲烷,而甲烷可以是微生物受到高压和高温作用时产生的。由此可以推断火星上曾经有过生物,甚至可能有过像人一样的高级生物。以下条件除了哪项外,都对上文的结论提出质疑( )

A.火星陨石在地球上的60万年间可能产生了很多的化学变化,要界定其中哪些物质仍完全保留着在火星上的性质不是那么容易的

B.60万年的时间与宇宙的年龄相比是微不足道的,但在这一期间的生物进化的历史可以是丰富多彩的

C.微生物受到高压和高温作用时可以产生甲烷,但甲烷是否可以由其他方法产生是有待探讨的一个问题

D.由微生物进化到人类需要足够的时间和合适的条件,其复杂性及其中的一些偶然性可能是现在的人们难以想像的

题型:填空题

潜山弄油气藏属于()油气藏。

题型:填空题

输液的质量要求中与注射剂质量要求有差异的是()

A.一定pH

B.适当的渗透压

C.无热原

D.澄明度符合要求

E.抑菌剂的加入

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