豆类中不能被人体吸收利用的糖类约占其糖类总量的（） A.100% B.75% C.5

下列哪项对能量代谢影响最为显著

A．环境温度增高

B．精神活动

C．进食活动

D．肌肉活动

读我国东南沿海某自然村相关资料回答下列问题。

材料一：该自然村等高线分布示意图

材料二：

    该自然村年降水量约1500毫米，最冷月平均气温约10℃，最热月平均气温约28℃；人口密度约550人/平方千米。

（1）该自然村的农业地域类型最有可能是什么？这里发展该农业的有利条件有哪些？

    _________________________________________________________________________________________

    _________________________________________________________________________________________

（2）甲、乙、丙、丁四处中，一般情况下商店比较集中的是_______处，理由是_____________________

    __________________________________________________________________。

The modern Olympic Games were founded with the intention of improving health and education, promoting world peace, and encouraging fair and equal competition. But over the years, the Olympic saying, "faster, higher, per", has pushed scientists as well as athletes to do everything possible to reach new levels.
Doctors, engineers and coaches all use everything science has to offer to achieve that little bit extra in competition. The reason modern technology has become part of sport is very simple: winning is just as important as it was 2,500 years ago at the Olympics of ancient Greece.
Developments in technology have often been reflected in the methods of training and performance used at the Olympics through history. This technology falls into two main groups: improving an athlete’s performance in competition, and allowing results to be measured more accurately.
The introduction of high-tech equipment means that athletes in all sports, from the 100-metres sprint to the pole vault, can now train more effectively and nourish their bodies better.

下列关于生物膜系统的叙述，正确的是（）

A.原核细胞无核膜及细胞器膜因而不具生物膜

B.细胞膜功能的复杂程度取决于磷脂的种类和数量

C.内质网膜为多种酶提供了大量的附着位点

D.高尔基体膜与内质网膜在结构上直接联系

患者男性，57岁。胸骨后持续性疼痛3小时急诊入院，疼痛呈压榨性，向左肩部放射，有濒死感，休息与口含硝酸甘油均不能缓解，伴大汗，无心悸、气短，二便正常。既往无高血压和冠心病病史，无药物过敏史。吸烟20余年，每天1包，不嗜酒。体检：T37.2℃，P 110次/分，R 22次/分，BP 90/60mmHg，急性痛苦面容，平卧位，无皮疹和发绀，浅表淋巴结未触及肿大。

为明确诊断应做的检查是

A．血清心肌酶谱

B．血清肌钙蛋白

C．心电图

D．胸片

E．血气分析

F．血糖和血脂

G．急诊胃镜

H．凝血功能检查