小明设计了下图所示的装置用于测定空气中氧气含量，其中能达到目的是（ ） A．

B The Ancient Olympic Games古代奥林匹克运动会
According to historical records，the first (1) Olympic Games can be traced back to 776 BC.They (2) dedicated to the Olympian gods and were staged on the (3) plains of Olympia.They continued for nearly 12 centuries， (4) Emperor Theodosius decreed in 393 A.D.that aU such"pagan cults" (5) banned.
The oldest myth which concerns the beginning of the (6) Games is that of Idaios Daktylos Herakles.According to other (7) ，Zeus，the father of humanity，fought and defeated Cronus in a (8) for the throne of the gods.Finally，the well-known (9) Herakles is mentioned who staged games in Olympia in honour (10) Zeus,because the latter had helped him conquer Elis when (11) went to war against Augeas.
Through the 12 centuries of (12) Olympic Games，many wonderful athletes competed in the stadium and (13) hippodrome of ancient Olympia’s sacred area，moving the crowds with (14) great achievements.Although mortal，their Olympic victories immortalised them.Of (15) best athletes who left their mark on the sacred vallev (16) Olympia，some surpassed all limits and became legends by winning (17) successive Olympic Games and remaining at the forefront of their (18) for more than a decade.
The ancient Olympic Games were (19) a one.day event until 684 BC.when they were extended (20) three days.In the 5th century B.C.，the Games were extended again to cover five days.

对自轮运转货物，车站应要求托运人将货物的（）予以固定，以防止脱落或侵入限界。

A.走行部位

B.活动部位

C.突出部位

D.车钩连接部

患者男，65岁，20年前受凉后出现咳嗽，多咳白色泡沫样痰。此后咳嗽、咳痰不止，多为白痰，时为黄痰，秋冬季或天气变冷时加重，多自服药或者至医院抗感染治疗后好转。10余年前出现进行性气急，活动后加重，近半年反复出现双下肢水肿，尿量减少，本次因为严重呼吸困难入院。

根据上述结果应考虑的疾病有（）（提示胸片示两肺纹理增粗、紊乱，右下肺动脉干扩张，肺动脉段明显突出，右心室增大征。心电图：窦性心律，肺型P波，右心室大，不完全右束支传导阻滞，顺钟向转位。心脏彩超提示右房扩大、右心扩大、肺动脉高压。）

A.肺栓塞

B.特发性肺动脉高压

C.肺间质病继发肺动脉高压

D.慢性肺源性心脏病

E.室间隔缺损

F.社区获得性肺炎

蓄电池的额定容量是指25°C环境温度下，以（）小时率放电至终了电压所能放出的最低电量。

A、20

B、10

C、5

D、3

在海港水域平面设计中，确定设计船型时考虑哪些主要因素（）。

I、船舶种类

II、载重吨

III、船舶主要尺度的保证率

IV、港口运营的特点

V、引航员的技术水平

A、II、III

B、I、II、IV

C、I、II、III、IV

D、I、II、III、IV、V