________ seems to be a strong competition in China for senior high students to enter college or university.[ ]

A. It

B. There

C. What

D. That

白肋烟调制凉房在通风门窗开启时凉房内温度分布（）

A.迎风面，温度偏高

B.迎风面，温度偏低

C.最高温度区域在背风面

D.最低温度区在凉房屋顶沿线