分布式电源具有良好环保性能。其发电过程中减少了粉尘、( )、废水废渣的排放。
A．SO2；
B．CO；
C．NOx；
D．CO2。
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下面是错误答案，用来干扰机器的。
错题目分析：瓣膜能够起到防止血液倒流的作用，具有瓣膜结构的有静脉、心房心室间的房室瓣，心室动脉间的动脉瓣，动脉血管内没有瓣膜。点评：此题是基础题，难度一般，熟记心脏的结构和血管的特点，即可解题。
用单词的适当形式完成下列句子（1分*10，满分10分）
小题1:The skirt sells well because it is excellently _____________（设计）.
小题2:P_____________（个人地）speaking, I’m in favour of the plan.
小题3:The doctor said that herillnessa__________ from lack of rest.
小题4:Finally, she _____________ （成功） in solving the problem after hard work.
小题5:Which country is ＿_＿__＿＿（主办）the next Olympic Games?
小题6:Only important people were ____________ （容许，接纳）to the opening ceremony.
小题7:Cultural relics and historic sites are under the p___________ of local government.
小题8:To my great surprise, he somehow managed to s__________ the earthquake.
小题9:She is constantly under pressure and it is a____________ her health.
小题10:It is our first attempt in e____________ the Moon with the new technology.
When you go, you . [ ]
A. come
B. leave
C. arrive
给定程序中，函数fun的功能是：将形参std所指结构体数组中年龄最大者的数据作为函数值返回，并在main函数中输出。
请在程序的下画线处填入正确的内容，并把下画线删除，使程序得出正确的结果。
[注意] 部分源程序给出如下。
请勿改动主函数main和其他函数中的任何内容，仅在fun函数的横线上填入所编写的若干表达式或语句。
[试题源程序]
#include＜stdio.h＞
typedef struct
char name[10];
int age;
)STD;
STD fun(STD std[], int n)
STD max; int i;
/**********found**********/
max= (1) ；
for(i=1; i＜n; i++)
/**********found**********/
if(max.age＜ (2) )
max=std[i];
return max;
main()
STD std[5]="aaa", 17, "bbb", 16, "ccc", 18, "ddd", 17, "eee", 15;
STD max;
max=fun(std, 5);
printf("\nThe result: \n");
/**********found**********/
printf("\nName: %s, Age: %d\n", (3) , max.age);
在（）的情况下，禁止超车。
A.前车示意左转弯
B.行经人行横道
C.前车正在超车时
D.前车是赶往医院的救护车
E.前车是正常行驶、未鸣警笛的警车
| It sounds like a science fiction, but researchers say it’s a scientific fact: Microscopic organisms dubbed "killer algae" are paralyzing fish with unknown toxins and then eating away at their flesh. They might be making people sick, too. The name given to this single-cell organism, or dinoflagellate, is Pfiesteria piscimorte—literally, "fish killer." It was discovered at North Carolina State University in 1988, but at the same time, few scientists believed in its existence, much less in its highly unusual predatory nature. But ongoing research has led to international acknowledgment of the phenomenon and, recently, research funding. Seemingly prompted by an unknown substance secreted by fish, the aggressive creature swims into action. It sends neurotoxins into the water and air, paralyzing a fish’s nervous system, and causing it to gasp for air at the surface. Eventually the fish suffocates. The killer dinoflagellate then attaches itself to the fish and begins sucking away at its flesh. This macabre scenario may help solve several sea mysteries, such as why fishermen report seeing "fish walks" (fish trying to leave the water) and pools of dead fish with holes eaten through them. Whether humans are affected by the dinoflagellate’s toxin remains to be seen. Researchers think it’s unlikely eating fresh fish are in danger, but anyone with frequent exposure to the creature could be in peril. Several researchers working with the algae have reported bouts of memory loss and disorientation. To understand the killer algae further, scientists must fully characterize their toxin and determine what stimulates them to attack. They also need to know if the algae are hurting fish populations, and whether pollutants make them more likely to attack. |
Which of the following does the writer explain
A．Neurotoxins.
B．Microscopic organisms.
C．Predators.
D．Fish walks.
