毛细血管和静脉血之间无论细胞成分或化学组成都存在（）
A.无明显差异
B.明显差异
C.程度不同差异
D.完全相同
E.基本相同
参考答案：C
单词拼写。
1. They have a school t____________ every year.
2. August is the e____________ month of the year.
3. F____________ is the second month of the year.
4. —What's the d____________ today? —It's March 2nd.
5. S____________ 10th is Teachers' Day.
6. We come from China.We speak C____________.
7. December is the t____________ month of the year.
8. B____________ is the date of one's birth.
9. N____________ comes after October.
10. The Spring ____________ is important to every Chinese.
汽车通过性的支撑与牵引的参数有（），最大动力因素和相对附着重量。
A、单位压力
B、指示压力
C、有效压力
D、平均压力
