与棘轮机构相比较，槽轮机构适用于哪个场合？（）A、转速较高，转角较小 B、转速较低，转

Wearing clothes is not just about fashion. We need clothes to stay warm or cool in different weather. I have three friends. They are from different places. And they like to wear different clothes.

Dave is from the UK. He likes rainy days, because rain makes the grass green. On a rainy day, he often wears his rain boots. He also likes his light blue umbrella.

Mona is from Australia. She likes sunny days. She likes to go to the beach. She often wears her beautiful skirt with her blouse.

Peter is from Canada. He likes snowy days. He likes to play with snow. He often wears his coat. He also likes to wear his scarf and gloves.

小题1:People need clothes to stay         in different weather.

A. warm of cool         B. big or small         C. tall and short

小题2:How many friends does the writer have?

A. One.                 B. Two.             C. Three.

小题3:What weather does Dave like?

A. Rainy days.              B. Sunny days.      C. Snowy days.

小题4:What clothes does Mona often wear?

A. Her jacket with her shorts

B. Her skirt with her blouse.

C. Her coat with her pants.

小题5:Where is Peter from?

A. The UK.              B. Australia.           C. Canada.

元朝时，“西域之士于中朝，学于南夏，乐江湖而忘乡国者众矣”；“中原之士西游昆仑圃，北望大荒之野。涉黄河之流，而寻瑶池之律。”上述历史现象揭示了元朝（）①疆域辽阔②中原文化向边疆地区扩展③各民族交往密切④新的民族出现

A①②

B②③

C①②③

D①②③④

不宜单独用于治疗嗜铬细胞瘤的药物是（）。

A.哌唑嗪

B.阿替洛尔

C.酚妥拉明

D.硝普钠

E.酚苄明

有关亚洲地形与河流的叙述，正确的是：[ ]

A．是世界上平均海拔最高的洲

B．中部地势高，四周地势低

C．有世界上面积最大的平原

D．河流均流向太平洋

应当严格分开放置、明确标示的不同内镜洗消设备，包含（）

A.上消化道与下消化道、消毒与灭菌的内镜

B.脑室镜与关节镜

C.直肠镜与结肠

D.腹腔镜与宫腔镜