方框图化简时，并联连接方框总的输出量为各方框输出量的（）。 A.乘积 B.代数和 C

根据短文内容，回答问题。

     My name is Chen Lan. My home is in Gulangyu. Where is Gulangyu, do you know? It is in Xiamen.

It is near the sea (海). Gulangyu is a small place, but it is very nice and clean. There are no cars, no buses

and no bikes. People only walk. So it is very quiet.Our house is in the middle of Gulangyu. Behind our house

there is a big old tree. My grandfather tells me the tree is very old. There are many birds in the tree. We call

it "bird tree".

      Our house is near the sea. The sea is big and blue. There are a lot of fish in the sea. After school, I go

there and catch fish with my friends. It is very interesting. I like eating and catching fish. 

1. Why do people only walk in Gulangyu?

__________________________________________________

2. Where is the "bird tree"?

__________________________________________________

3. What color is the sea?

__________________________________________________

4. Are there any fish in the sea?

__________________________________________________

5. What's in the old tree?

__________________________________________________

阅读下列材料：     

对两次工业革命在人类历史发展中的影响，国内外史学界大体上有两种不同的评价。一种观点认为，两次工业革命从根本上改变了人类各领域的面貌，极大地提高了人类的文明程度和社会发展水平，具有史无前例的积极影响。另一种观点认为，由于工业社会具有高度的能动性，物质资本和人力资本都受到加速废弃的威胁；工业革命本质上是建立在利用不可再生的无生命能源这一基础上的，它的枯竭意味着人类将回复到农业活动水平上去，从而面临生活水平极大而痛苦的下降；工业革命的残余物正迅速地污染环境、妨碍生态平衡，甚至破坏人类的遗传；工业革命还带来人口爆炸，它一方面加速能源消耗、恶化生态环境，从而使社会发展停滞，另一方面会使地球生态更加失衡，导致灾难性的生态危机。

你对此问题持什么态度？试说明理由。

下面程序的执行结果为
#includ"iostream"
using namespace std;
class A
｛
int a;
public:
void Seta(int x)｛a＝x;｝
void Display_a()｛cout＜＜a＜＜endl;｝
｝;
class B
｛
int b;
public:
void Setb(int x)｛b＝x;｝
void Dispaly_b()｛cout＜＜b＜＜endl;｝
｝;
class C:public A,private B
｛
private:
int c;
public:
void Setc(int x,int y,int z)
｛c＝z;Seta(x);Setb(y);｝
void Display_c()｛cout＜＜c＜＜endl;｝
｝;
① void main()
② ｛
③ C cc;
④ cc.Seta(1);
⑤ cc.Display_a();
⑥ cc.Setc(2,2,3);
⑦ cc.Dispaly_();
⑧ cc.Display_c();
｝

A．输出为2 2 3

B．有错误在第5行

C．输出为1 2 3

D．有错误在第7行

进口提单记载CY－CY、STC，电子产品，但掏箱后发现箱内装载石头，收货人向保险人提出赔偿要求，保险人不赔。

通信电源设备及重要建筑用电设备用交流电供电时，在设备的电源输人端子处测量的电压允许变动范围为额定电压值的（）。

A、－5%～＋5%

B、－10%～＋5%

C、－10%～＋10%

D、－15%～＋10%