不会成为膀胱癌致癌危险因素的是（） A.膀胱白斑 B.吸烟 C.长期慢性膀胱

In this section, you will hear several passages. Listen to the passages carefully and then answer the questions that follow.

What is the purpose of this talk

A. To encourage people to participate in a club activity.
B. To introduce a new kind of bicycle.
C. To inform beginning cyclists about New Jersey’s traffic laws.
D. To warn tourists about bicycling on the roadways.

同条件养护试块的强度对表值按GBJ107-87规定确定后应乘折算系数1.10，不可做适当调整。

顶进圆涵施工，主要顶进工具是螺旋式千斤顶。

南极洲最丰富的自然资源是（）

A.煤炭资源

B.铁矿资源

C.生物资源

D.固体淡水资源

消化管由口、咽、食管、胃、（）、大肠和肛门组成。

A.小肠

B.十二指肠

C.回肠

D.胆