下列哪种血红蛋白及其衍生物的颜色是错误的（） A.氰化高铁血红蛋白呈鲜红色 B.高铁

More and more people around the world are joining in dangerous sports. Some people climbed the highest mountains; some traveled into unknown parts of the world; some sailed small boats across the largest sea. Now some people begin to look for new excitement.

Bungee jumping (蹦极) and motorcycle racing (摩托车赛) are quite dangerous sports. Bungee jumping only lasts a few minutes or even seconds. You jump from a high place, 200 meters above the ground, and there is a rubber band (橡胶带子) tied to your legs. When you jump down, the rubber band pulls you up. About 2,000,000 people around the world have tried bungee jumping.

Why do people join in these dangerous sports? Some scientists say that it is because modern life has become safe and it is not interesting. In the past, people lived in danger. They had to go out and look for food, and life was like a fight but was interesting.

Many people think that there is little excitement in life. They live and work in safe places, buy food in shops, and there are doctors and hospitals to look after them if they become ill.

小题1:People like to join in dangerous sports because _______.

A．they have a lot of free time

B．they can go to the hospital if they are hurt

C．they need excitement

D．they don’t need to look for food小题2:_______ is not a dangerous sport.

A．Climbing the highest mountains

B．Riding on the road

C．Traveling into unknown parts of the world

D．Sailing small boats across the largest sea小题3:In bungee jumping, you _______.

A．jump up as high as you can

B．jump down with a rubber band tied to your legs

C．jump down without a rubber band

D．jump to the ground小题4:In the past, people lived in danger because _______.

A．the living condition is poor

B．there was no doctor and hospital

C．there were many dangerous animals

D．all of above小题5:Which is not TRUE?

A．Everyone’s life is interesting.

B．Many people live and work in safe places.

C．Many people buy food in shops.

D．People can go to see the doctors when they become ill.

如图所示为点电荷a、b（左为a，右为b）所形成电场的电场线分布图，以下几种说法中正确的是

A．a、b为异种电荷，a的电荷量大于b的电荷量

B．a、b为异种电荷，a的电荷量小于b的电荷量

C．a、b为同种电荷，a的电荷量大于b的电荷量

D．a、b为同种电荷，a的电荷量小于b的电荷量

我国的根本政治制度是（）。

A．民主集中制

B．人民民主专政制度

C．人民代表大会制度

D．社会主义制度

患儿，10天，今洗澡时发现双小腿皮肤冷硬而就诊。系第1胎，孕36周顺产，出生体重2.4kg，生后第2天皮肤稍黄，近2天黄疸有所加深，家长诉无发热，吸奶好。查体：体温35.5℃，呼吸40次/分，脉搏120次/分，全身皮肤中度黄染，无发绀，双肺呼吸音清，无啰音，心音有力。腹平软，脐部少许分泌物，脐周皮肤微红，肝右肋下2cm，质软，脾未扪及。检查结果：白细胞6×10⁹/L，中性粒细胞0.52，淋巴细胞0.48，ESR15mm/h。血培养结果尚未回报。

作为新生儿硬肿症，最有意义的体征是（）

A.全身冰凉

B.双小腿皮肤似硬橡皮样

C.按压双小腿似有凹陷

D.动作少，不哭，吸吮困难

E.脉搏微弱

下图所示为你身体不同部位（或器官）生长速度的曲线图，其中，能代表生殖器官生长的曲线是（　　）。

A．a

B．b

C．c

D．都不是