【单选题】【消耗次数：1】
By cutting down trees we ____ the natural home of birds and animals.
①
harm
②
hurt
③
injure
④
damage
参考答案：
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【多选题】
______________ , we went home.
①
The problem solved
②
The problem is solved
③
When the problem solved
④
When the problem was solved
【简答题】
We trust that you will give special care to the packing in order to avoid damage in transit.
【多选题】
We were very tired and wanted to get home ____________________ .
①
as soon as possible
②
as quickly as possible
③
as fast as possible
④
as much as possible
【单选题】
We looked for a table to sit down, but they were all ____.
①
reserved for
②
engaged in
③
used up
④
taken up
【单选题】
- Shall we sit up here on the grass or down there near the water?
①
I’d rather stay here if you don’t mind
②
Sorry, I don’t like neither
③
Certainly, why not?
④
Yes, we like these two places
【单选题】
Shall we sit up here on the grass or down there near the water?_________
①
I’d rather stay here if you don’t mind.
②
Sorry, I don’t like neither.
③
Certainly, why not?
④
Yes, we like these two places.
【单选题】
Trees mainly serve man in three important ways: They provide him with wood and other products; they provide him shade; and they help to prevent droughts and floods.Unfortunately, in many parts of the world, man has not realized that the third of these services is the most important．In his eagerness to make money from trees, he has cut them down in large numbers, only to find that without them he has lost the best friends he had. And besides, he is usually too careless to plant and look after new trees. So the forests slowly disappear.This does not only mean that man will have fewer trees. The results are even more serious: for where there are trees, their roots break up soil allowing the rain to sink in and also bind(固定) the soil, thus preventing it from being washed away easily；but where there are no trees, the rain falls on hard ground and flows away, causing floods and carrying away the rich top-soil. When the top-soil is gone, nothing remains but worthless desert.Two thousand years ago，a rich and powerful country cut down its trees to build warships, with which to gain itself an empire．It set up the empire, but, without its trees, its soil became poor and grew weak. When the empire fell to pieces, the home country found itself faced by floods and starvation(饥荒)．Land becomes desert after all trees are cut down because __________.
①
roots of trees break up the soil
②
no tree keeps the rain and protects the top-soil
③
strong winds bring a lot of sand
④
there are too many rainfalls to make it
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【多选题】
关于递归的有关内容描述项正确的是（）
①
可以采用递归解决汉诺塔游戏的问题
②
递归可以分为直接递归与间接递归
③
可以采用递归解决求一个数n！问题
④
递归就是在过程或函数里调用自身
【多选题】
当定义一个共用体（联合）变量时，系统分配内存给它，以下说法错误的是（）
①
各成员所需内存量的总和
②
成员中占内存量最大者所需的容量
③
共用体中最后一个成员所需内存量
④
共用体中第一个成员所需内存量
【多选题】
以下关于跳转语句的叙述中不正确的是（）。
①
continue语句的作用是：使程序的执行流跳出包含它的所有循环
②
break语句只能用在循环体内和switch语句体内
③
在循环体内使用break语句和continue语句的作用相同
④
break语句只能用在switch语句体内
【单选题】
while（fabs（t）<1e-5）if（!（s/10））break；循环结束的条件是（）.
①
t=1e-5∣∣t=-1e-5∣∣s-10s10
②
fabs（t）＜1e-5!s/10
③
fabs（t）＜1e-5
④
s/10==0
【单选题】
下述是C语言中有关变量定义的几个说法，正确的是：（）
①
变量可以不定义直接使用
②
一个说明语句只能定义一个变量
③
几个不同类型的变量可在同一语句中定义
④
变量可以在定义时进行初绐化