下列叙述中有关时间肺活量错误的是()。
A.是用力呼气量
B.限制性通气障碍时降低
C.肺气肿病人的降低
D.与最大通气量的关系密切
E.与是否限制呼吸时间有关
参考答案:B
在下列各句中的每个空格内填上一个适当的、完整的单词或短语。
1. Children under 1.2 m in _____ (高度) take the train freely in this country.
2. —How much is the book?
—It cost ______ (至少) three dollars.
3. As everyone knows, water _____ (结冰) at the temperature of zero degree centigrade.
4. Sam is a good teacher with lots of ______ (经验) in teaching.
5. Your composition is good _______ (除了) for some spelling mistakes.
天然地基土的分类中,粒径大于0.05mm,小于0.075mm的颗粒的土是( )。
A.碎石土 B.砂土 C.粘性土 D.粉土